How to Interpret the MIL-PRF-6855 Specification
Sheet Rubber, Rubber Strip, Rubber Tubing, and Extruded Rubber U-Channels
MIL-PRF-6855 is a military rubber specification that outlines the key requirements for specific rubber parts that have been fabricated into sheets, strips, molded, and extruded shapes. Each specification contains 3-4 sections that correlate to the required performance and dimensions which the final part must exhibit.
We have organized these sections, provided the necessary tables, and written descriptions for 4 types.
Jump to your required specification by selecting one below.
This first specification refers to rubber sheet. The requirements to meet this specification are outlined in the tables below. MIL-PRF-6855/1A supersedes MIL-R-6855/1.
This specification can read as follows. Use the tables in this section to interpret a specification or write the requirements of your material.
Example: M6855/1-010423
Dimensional tolerances: Tolerances of MIL-PRF-6855, table I and II, shall apply to sheet width and thickness respectively. Tolerance for sheet lengths shall be -0 percent, +3 percent of the specified length.
Surface finish: All synthetic rubber sheet surfaces shall be smooth and free from cloth imprint, pin holes, flash, or any other imperfections which may impair serviceability.
Verification: Inspection and test of synthetic rubber sheets shall be in accordance with MIL-PRF-6855, Section 4, VERIFICATION.
TABLE I. Type, class, grade. for 1,2,4
| Classification Number | Classification of Requirements | ||
|---|---|---|---|
| 01 | Class 1 | Grade 30 | |
| 02 | Class 1 | Grade 40 | |
| 03 | Class 1 | Grade 50 | |
| 04 | Class 1 | Grade 60 | |
| 05 | Class 1 | Grade 70 | |
| 06 | Class 1 | Grade 80 | |
| 07 | Type A | Class 1 | Grade 30 |
| 08 | Type A | Class 2 | Grade 40 |
| 09 | Type A | Class 2 | Grade 50 |
| 10 | Type A | Class 2 | Grade 60 |
| 11 | Type A | Class 2 | Grade 70 |
| 12 | Type A | Class 2 | Grade 80 |
| 13 | Type B | Class 2 | Grade 30 |
| 14 | Type B | Class 2 | Grade 40 |
| 15 | Type B | Class 2 | Grade 50 |
| 16 | Type B | Class 2 | Grade 60 |
| 17 | Type B | Class 2 | Grade 70 |
| 18 | Type B | Class 2 | Grade 80 |
| 19 | Class 3 | Grade 30 | |
| 20 | Class 3 | Grade 40 | |
| 21 | Class 3 | Grade 50 | |
| 22 | Class 3 | Grade 60 | |
| 23 | Class 3 | Grade 70 | |
| 24 | Class 3 | Grade 80 | |
| 25 | Type A | Class 4 | Grade 30 |
| 26 | Type A | Class 4 | Grade 40 |
| 27 | Type A | Class 4 | Grade 50 |
| 28 | Type A | Class 4 | Grade 60 |
| 29 | Type A | Class 4 | Grade 70 |
| 30 | Type A | Class 4 | Grade 80 |
| 31 | Type B | Class 4 | Grade 30 |
| 32 | Type B | Class 4 | Grade 40 |
| 33 | Type B | Class 4 | Grade 50 |
| 34 | Type B | Class 4 | Grade 60 |
| 35 | Type B | Class 4 | Grade 70 |
| 36 | Type B | Class 4 | Grade 80 |
| 37 | Class 5 | Grade 30 | |
| 38 | Class 5 | Grade 40 | |
| 39 | Class 5 | Grade 50 | |
| 40 | Class 5 | Grade 60 | |
| 41 | Class 5 | Grade 70 | |
| 42 | Class 5 | Grade 80 | |
TABLE Ia. Class & Type
| Class/Type | Description |
|---|---|
| Class 1 | Fuel and petroleum oil resistant |
| Class 2 | Petroleum oil, weather, and ozone resistant |
| Class 3 | Non-oil resistant |
| Class 4 | Petroleum oil, weather, and ozone resistant (for use in contact with acrylic and polycarbonate plastics) |
| Class 5 | Non-oil resistant (for use in contact with acrylic and polycarbonate plastics) |
| Type A | High ozone concentration |
| Type B | Low ozone concentration |
TABLE II. Sheet thickness – T.
| Sheet Thickness Number | T (Inches) |
|---|---|
| 04 | 0.015 |
| 08 | 0.031 |
| 12 | 0.062 |
| 16 | 0.094 |
| 20 | 0.125 |
| 24 | 0.156 |
| 28 | 0.187 |
| 32 | 0.250 |
| 36 | 0.312 |
| 40 | 0.375 |
| 44 | 0.438 |
| 48 | 0.500 |
| 52 | 0.562 |
| 56 | 0.625 |
| 60 | 0.750 |
| 64 | 0.875 |
| 68 | 1.000 |
| 72 | 1.250 |
| 76 | 1.500 |
TABLE III. Sheet length – L.
| Sheet Length Number | L (Inches) |
|---|---|
| 1 | 24.000 |
| 2 | 36.000 |
| 3 | 48.000 |
| 4 | 60.000 |
| 5 | 72.000 |
| 6 | 120.000 |
| 7 | 144.000 |
| 8 | 300.000 |
TABLE IV. Sheet width – W.
| Width Number | W (Inches) |
|---|---|
| 1 | 12.000 |
| 3 | 18.000 |
| 5 | 24.000 |
| 7 | 36.000 |
| 9 | 40.000 |
Metric Conversion Chart¹
| Inch | mm | Inch | mm | |
|---|---|---|---|---|
| 0.015 | 0.38 | 0.875 | 22.23 | |
| 0.031 | 0.79 | 1.000 | 25.40 | |
| 0.062 | 1.57 | 1.250 | 31.75 | |
| 0.094 | 2.39 | 1.500 | 38.10 | |
| 0.125 | 3.18 | 12.000 | 304.80 | |
| 0.156 | 3.96 | 18.000 | 457.20 | |
| 0.187 | 4.75 | 24.000 | 609.60 | |
| 0.250 | 6.35 | 36.000 | 914.40 | |
| 0.312 | 7.92 | 40.000 | 1016.00 | |
| 0.375 | 9.52 | 48.000 | 1219.20 | |
| 0.438 | 11.13 | 60.000 | 1524.00 | |
| 0.500 | 12.70 | 72.000 | 1828.80 | |
| 0.567 | 14.27 | 120.000 | 3048.00 | |
| 0.625 | 15.88 | 144.000 | 3657.60 | |
| 0.750 | 19.05 | 300.000 | 7620.00 |
¹Metric equivalents are given for general information only.
GENERAL NOTES TO TABLES:
- Dimensions are in inches.
- Metric equivalents are given for general information only.
- Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5 synthetic rubber sheets.
- This information is based upon the Performance Specification Sheet – Rubber, Synthetic, Sheets as of September 2023. To find more information, visit http://assist.dla.mil
This specification refers to rubber strips. The requirements to meet this specification are outlined in the tables below. MIL-PRF-6855/2A supersedes MIL-R-6855/2.
This specification can read as follows. Use the tables in this section to interpret a specification or write the requirements of your material.
Example: M6855/2-01A204
Dimensional tolerances: Tolerances of MIL-PRF-6855, tables I and II, shall apply to strip width and thickness respectively. Tolerance
for strip length shall be -0 percent, +3 percent of the specified length.
Surface finish: All synthetic rubber strip surfaces shall be smooth and free from cloth imprint.
Verification: Inspection and test of synthetic rubber strips shall be in accordance with MIL-PRF-6855, Section 4, VERIFICATION.
TABLE I. Type, class, grade.
| Classification Number | Classification of Requirements | ||
|---|---|---|---|
| 01 | Class 1 | Grade 30 | |
| 02 | Class 1 | Grade 40 | |
| 03 | Class 1 | Grade 50 | |
| 04 | Class 1 | Grade 60 | |
| 05 | Class 1 | Grade 70 | |
| 06 | Class 1 | Grade 80 | |
| 07 | Type A | Class 1 | Grade 30 |
| 08 | Type A | Class 2 | Grade 40 |
| 09 | Type A | Class 2 | Grade 50 |
| 10 | Type A | Class 2 | Grade 60 |
| 11 | Type A | Class 2 | Grade 70 |
| 12 | Type A | Class 2 | Grade 80 |
| 13 | Type B | Class 2 | Grade 30 |
| 14 | Type B | Class 2 | Grade 40 |
| 15 | Type B | Class 2 | Grade 50 |
| 16 | Type B | Class 2 | Grade 60 |
| 17 | Type B | Class 2 | Grade 70 |
| 18 | Type B | Class 2 | Grade 80 |
| 19 | Class 3 | Grade 30 | |
| 20 | Class 3 | Grade 40 | |
| 21 | Class 3 | Grade 50 | |
| 22 | Class 3 | Grade 60 | |
| 23 | Class 3 | Grade 70 | |
| 24 | Class 3 | Grade 80 | |
| 25 | Type A | Class 4 | Grade 30 |
| 26 | Type A | Class 4 | Grade 40 |
| 27 | Type A | Class 4 | Grade 50 |
| 28 | Type A | Class 4 | Grade 60 |
| 29 | Type A | Class 4 | Grade 70 |
| 30 | Type A | Class 4 | Grade 80 |
| 31 | Type B | Class 4 | Grade 30 |
| 32 | Type B | Class 4 | Grade 40 |
| 33 | Type B | Class 4 | Grade 50 |
| 34 | Type B | Class 4 | Grade 60 |
| 35 | Type B | Class 4 | Grade 70 |
| 36 | Type B | Class 4 | Grade 80 |
| 37 | Class 5 | Grade 30 | |
| 38 | Class 5 | Grade 40 | |
| 39 | Class 5 | Grade 50 | |
| 40 | Class 5 | Grade 60 | |
| 41 | Class 5 | Grade 70 | |
| 42 | Class 5 | Grade 80 | |
TABLE Ia. Class & Type
| Class/Type | Description |
|---|---|
| Class 1 | Fuel and petroleum oil resistant |
| Class 2 | Petroleum oil, weather, and ozone resistant |
| Class 3 | Non-oil resistant |
| Class 4 | Petroleum oil, weather, and ozone resistant (for use in contact with acrylic and polycarbonate plastics) |
| Class 5 | Non-oil resistant (for use in contact with acrylic and polycarbonate plastics) |
| Type A | High ozone concentration |
| Type B | Low ozone concentration |
TABLE II. Strip thickness – T.
| Strip Thickness Letter | T (Inches) |
|---|---|
| A | 0.015 |
| E | 0.031 |
| H | 0.062 |
| J | 0.093 |
| L | 0.125 |
| N | 0.187 |
| P | 0.250 |
| R | 0.375 |
| T | 0.500 |
| W | 0.625 |
| Y | 1.000 |
TABLE III. Strip length – L.
| Strip Length Number | L (Inches) |
|---|---|
| 1 | 12.000 |
| 2 | 24.000 |
| 3 | 36.000 |
| 4 | 60.000 |
| 5 | 144.000 |
| 6 | 300.000 |
| 7 | 900.000 |
TABLE IV. Strip width – W.
| Strip Width Number | W (Inches) |
|---|---|
| 02 | 0.250 |
| 04 | 0.500 |
| 06 | 0.750 |
| 08 | 1.000 |
| 10 | 1.250 |
| 12 | 1.500 |
| 14 | 1.750 |
| 16 | 2.000 |
| 18 | 3.000 |
| 20 | 4.000 |
| 22 | 5.000 |
| 24 | 6.000 |
Metric Conversion Chart¹
| Inch | mm | Inch | mm | |
|---|---|---|---|---|
| 0.015 | 0.38 | 1.750 | 44.45 | |
| 0.031 | 0.79 | 2.000 | 50.80 | |
| 0.062 | 1.57 | 3.000 | 76.20 | |
| 0.093 | 2.36 | 4.000 | 101.60 | |
| .0125 | 3.18 | 5.000 | 127.00 | |
| 0.187 | 4.75 | 6.000 | 152.40 | |
| 0.250 | 6.35 | 12.000 | 304.80 | |
| 0.375 | 9.53 | 24.000 | 609.60 | |
| 0.500 | 12.70 | 36.000 | 914.40 | |
| 0.625 | 15.88 | 60.000 | 1524.00 | |
| 0.750 | 19.05 | 144.000 | 3657.60 | |
| 1.000 | 25.40 | 300.000 | 7620.00 | |
| 1.250 | 31.75 | 900.000 | 22860.00 | |
| 1.500 | 38.10 |
¹Metric equivalents are given for general information only.
GENERAL NOTES TO TABLES:
- Dimensions are in inches.
- Metric equivalents are given for general information only.
- Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5.
- This information is based upon the Performance Specification Sheet – Rubber, Synthetic, Strips as of September 2023. To find more information, visit http://assist.dla.mil
This specification refers to rubber tubing. The requirements to meet this specification are outlined in the tables below. MIL-PRF-6855/4A supersedes MIL-R-6855/4.
This specification can read as follows. Use the tables in this section to interpret a specification or write the requirements of your material.
Example: M6855/4-01L023
Dimensional tolerances: Tolerances for tubing inside diameter and wall thickness shall be in accordance with tables IIA, IIB, and IIC herein, as applicable. Tolerance for tubing length shall be -0 percent, +3 percent of the specified length.
Surface finish: All synthetic rubber tubing surfaces shall be smooth and free from pin holes, flash, or any other imperfections which may impair serviceability.
Verification: Inspection and test of synthetic rubber tubing shall be in accordance with MIL-PRF-6855, Section 4, VERIFICATION.
TABLE I. Type, class, grade.
| Classification Number | Classification of Requirements | ||
|---|---|---|---|
| 01 | Class 1 | Grade 30 | |
| 02 | Class 1 | Grade 40 | |
| 03 | Class 1 | Grade 50 | |
| 04 | Class 1 | Grade 60 | |
| 05 | Class 1 | Grade 70 | |
| 06 | Class 1 | Grade 80 | |
| 07 | Type A | Class 1 | Grade 30 |
| 08 | Type A | Class 2 | Grade 40 |
| 09 | Type A | Class 2 | Grade 50 |
| 10 | Type A | Class 2 | Grade 60 |
| 11 | Type A | Class 2 | Grade 70 |
| 12 | Type A | Class 2 | Grade 80 |
| 13 | Type B | Class 2 | Grade 30 |
| 14 | Type B | Class 2 | Grade 40 |
| 15 | Type B | Class 2 | Grade 50 |
| 16 | Type B | Class 2 | Grade 60 |
| 17 | Type B | Class 2 | Grade 70 |
| 18 | Type B | Class 2 | Grade 80 |
| 19 | Class 3 | Grade 30 | |
| 20 | Class 3 | Grade 40 | |
| 21 | Class 3 | Grade 50 | |
| 22 | Class 3 | Grade 60 | |
| 23 | Class 3 | Grade 70 | |
| 24 | Class 3 | Grade 80 | |
| 25 | Type A | Class 4 | Grade 30 |
| 26 | Type A | Class 4 | Grade 40 |
| 27 | Type A | Class 4 | Grade 50 |
| 28 | Type A | Class 4 | Grade 60 |
| 29 | Type A | Class 4 | Grade 70 |
| 30 | Type A | Class 4 | Grade 80 |
| 31 | Type B | Class 4 | Grade 30 |
| 32 | Type B | Class 4 | Grade 40 |
| 33 | Type B | Class 4 | Grade 50 |
| 34 | Type B | Class 4 | Grade 60 |
| 35 | Type B | Class 4 | Grade 70 |
| 36 | Type B | Class 4 | Grade 80 |
| 37 | Class 5 | Grade 30 | |
| 38 | Class 5 | Grade 40 | |
| 39 | Class 5 | Grade 50 | |
| 40 | Class 5 | Grade 60 | |
| 41 | Class 5 | Grade 70 | |
| 42 | Class 5 | Grade 80 | |
TABLE Ia. Class & Type
| Class/Type | Description |
|---|---|
| Class 1 | Fuel and petroleum oil resistant |
| Class 2 | Petroleum oil, weather, and ozone resistant |
| Class 3 | Non-oil resistant |
| Class 4 | Petroleum oil, weather, and ozone resistant (for use in contact with acrylic and polycarbonate plastics) |
| Class 5 | Non-oil resistant (for use in contact with acrylic and polycarbonate plastics) |
| Type A | High ozone concentration |
| Type B | Low ozone concentration |
TABLE IIA. Light wall tubing sizes.
| Tubing Size Number | Minimum Inside Diameter (Inches) | Maximum Inside Diameter (Inches) | Nominal Inside Diameter (Inches) | Minimum Wall Thickness (Inches) | Maximum Wall Thickness (Inches) | Nominal Wall Thickness (Inches) |
|---|---|---|---|---|---|---|
| L02 | 0.109 | 0.141 | 0.125 | 0.031 | 0.047 | 0.039 |
| L04 | 0.109 | 0.141 | 0.125 | 0.047 | 0.063 | 0.055 |
| L06 | 0.141 | 0.172 | 0.156 | 0.047 | 0.063 | 0.055 |
| L08 | 0.172 | 0.203 | 0.188 | 0.047 | 0.063 | 0.055 |
| L10 | 0.234 | 0.266 | 0.250 | 0.047 | 0.079 | 0.063 |
| L12 | 0.297 | 0.328 | 0.312 | 0.047 | 0.079 | 0.063 |
| L14 | 0.359 | 0.391 | 0.375 | 0.047 | 0.079 | 0.063 |
| L16 | 0.422 | 0.453 | 0.438 | 0.047 | 0.079 | 0.063 |
| L18 | 0.484 | 0.516 | 0.500 | 0.047 | 0.079 | 0.063 |
| L20 | 0.547 | 0.578 | 0.562 | 0.047 | 0.079 | 0.063 |
| L22 | 0.609 | 0.641 | 0.625 | 0.047 | 0.079 | 0.063 |
| L24 | 0.734 | 0.766 | 0.750 | 0.047 | 0.079 | 0.063 |
| L26 | 0.859 | 0.891 | 0.875 | 0.047 | 0.079 | 0.063 |
| L28 | 0.984 | 1.016 | 1.000 | 0.047 | 0.079 | 0.063 |
TABLE IIB. Heavy wall tubing sizes.
| Tubing Size Number | Minimum Inside Diameter (Inches) | Maximum Inside Diameter (Inches) | Nominal Inside Diameter (Inches) | Minimum Wall Thickness (Inches) | Maximum Wall Thickness (Inches) | Nominal Wall Thickness (Inches) |
|---|---|---|---|---|---|---|
| H02 | 0.109 | 0.141 | 0.125 | 0.094 | 0.110 | 0.102 |
| H04 | 0.141 | 0.172 | 0.156 | 0.094 | 0.110 | 0.102 |
| H06 | 0.172 | 0.203 | 0.188 | 0.094 | 0.110 | 0.102 |
| H08 | 0.234 | 0.266 | 0.250 | 0.109 | 0.141 | 0.125 |
| H10 | 0.297 | 0.328 | 0.312 | 0.109 | 0.141 | 0.125 |
| H12 | 0.359 | 0.391 | 0.375 | 0.078 | 0.109 | 0.094 |
| H14 | 0.359 | 0.391 | 0.375 | 0.109 | 0.141 | 0.125 |
| H16 | 0.422 | 0.453 | 0.438 | 0.109 | 0.141 | 0.125 |
| H18 | 0.484 | 0.516 | 0.500 | 0.109 | 0.141 | 0.125 |
| H20 | 0.547 | 0.578 | 0.562 | 0.109 | 0.141 | 0.125 |
| H22 | 0.609 | 0.641 | 0.625 | 0.109 | 0.141 | 0.125 |
| H24 | 0.734 | 0.766 | 0.750 | 0.109 | 0.141 | 0.125 |
| H26 | 0.859 | 0.891 | 0.875 | 0.109 | 0.141 | 0.125 |
| H28 | 0.984 | 1.016 | 1.000 | 0.109 | 0.141 | 0.125 |
| H30 | 1.234 | 1.266 | 1.250 | 0.109 | 0.141 | 0.125 |
| H32 | 1.484 | 1.516 | 1.500 | 0.133 | 0.179 | 0.156 |
| H34 | 1.734 | 1.766 | 1.750 | 0.133 | 0.179 | 0.156 |
TABLE IIC. Extra heavy wall tubing sizes.
| Tubing Size Number | Minimum Inside Diameter (Inches) | Maximum Inside Diameter (Inches) | Nominal Inside Diameter (Inches) | Minimum Wall Thickness (Inches) | Maximum Wall Thickness (Inches) | Nominal Wall Thickness (Inches) |
|---|---|---|---|---|---|---|
| E02 | 0.109 | 0.141 | 0.125 | 0.156 | 0.219 | 0.188 |
| E04 | 0.141 | 0.172 | 0.156 | 0.156 | 0.219 | 0.188 |
| E06 | 0.172 | 0.203 | 0.188 | 0.156 | 0.219 | 0.188 |
| E08 | 0.234 | 0.266 | 0.250 | 0.156 | 0.219 | 0.188 |
| E10 | 0.297 | 0.328 | 0.312 | 0.156 | 0.219 | 0.188 |
| E12 | 0.359 | 0.391 | 0.375 | 0.219 | 0.281 | 0.250 |
| E14 | 0.422 | 0.453 | 0.438 | .0219 | 0.281 | 0.250 |
| E16 | 0.484 | 0.516 | 0.500 | 0.156 | 0.219 | 0.188 |
| E18 | 0.484 | 0.516 | 0.500 | 0.219 | 0.281 | 0.250 |
TABLE III. Tubing length – L.
| Tubing Length Number | L (Inches) |
|---|---|
| 3 | 72.000 |
| 5 | 144.000 |
| 7 | 300.000 |
| 9 | 1800.000 |
Metric Conversion Chart¹
| Inch | mm | Inch | mm | Inch | mm | Inch | mm | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.031 | 0.79 | 0.179 | 4.55 | 0.484 | 12.29 | 1.000 | 25.40 | |||
| 0.039 | 0.99 | 0.188 | 4.78 | 0.500 | 12.70 | 1.016 | 25.81 | |||
| 0.047 | 1.19 | 0.203 | 5.16 | 0.516 | 13.11 | 1.234 | 31.34 | |||
| 0.055 | 1.40 | 0.219 | 5.56 | 0.547 | 13.89 | 1.250 | 31.75 | |||
| 0.063 | 1.60 | 0.234 | 5.94 | 0.562 | 14.27 | 1.266 | 32.16 | |||
| 0.078 | 1.98 | 0.250 | 6.35 | 0.578 | 14.68 | 1.484 | 37.69 | |||
| 0.079 | 2.01 | 0.281 | 7.14 | 0.609 | 15.47 | 1.50 | 38.10 | |||
| 0.094 | 2.39 | 0.297 | 7.54 | 0.625 | 15.88 | 1.516 | 38.51 | |||
| 0.102 | 2.59 | 0.312 | 7.92 | 0.641 | 16.28 | 1.734 | 44.04 | |||
| 0.109 | 2.77 | 0.328 | 8.33 | 0.734 | 18.64 | 1.750 | 44.45 | |||
| 0.110 | 2.79 | 0.359 | 9.12 | 0.750 | 19.05 | 1.766 | 44.86 | |||
| 0.125 | 3.18 | 0.375 | 9.53 | 0.766 | 19.46 | 72.000 | 1828.80 | |||
| 0.133 | 3.38 | 0.391 | 9.93 | 0.859 | 21.82 | 144.000 | 3657.60 | |||
| 0.141 | 3.58 | 0.422 | 10.72 | 0.875 | 22.23 | 300.000 | 7620.00 | |||
| 0.156 | 3.96 | 0.438 | 11.13 | 0.891 | 22.63 | 1800.000 | 45720.00 | |||
| 0.172 | 4.37 | 0.453 | 11.51 | 0.984 | 24.99 |
¹Metric equivalents are given for general information only.
GENERAL NOTES TO TABLES:
- Dimensions are in inches.
- Metric equivalents are given for general information only.
- Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5 synthetic rubber sheets.
- This information is based upon the Performance Specification Sheet – Rubber, Synthetic, Tubing as of September 2023. To find more information, visit http://assist.dla.mil
This first specification refers to rubber U-Channels. The requirements to meet this specification are outlined in the tables below. MIL-PRF-6855/5A supersedes MIL-R-6855/5.
This specification can read as follows. Use the tables in this section to interpret a specification or write the requirements of your material.
Example: M6855/5-A0201D
Dimensional tolerances: Tolerances for channel dimensions shall in accordance with table IV herein. All corner and fillet radii shall be 0.015 inch except as otherwise specified. Tolerance for channel length shall be -0 percent, and +3 percent of the specified length.
Surface finish: All synthetic rubber tubing surfaces shall be smooth and free from pin holes, flash, or any other imperfections which may impair serviceability.
Verification: Inspection and test of synthetic rubber channel shall be in accordance with MIL-PRF-6855, Section 4, VERIFICATION.
FIGURE 1. Channel Styles A, B, C & D.
TABLE IA. Channel dimensions – Style A.
| Config. Number | A (Inches) | B (Inches) | C (Inches) | D (Inches) | E (Inches) | F (Inches) | Notes |
|---|---|---|---|---|---|---|---|
| A02 | 0.250 | 0.188 | 0.125 | 0.125 | 0.062 | 0.062 | See Note 4 |
| A04 | 0.250 | 0.250 | 0.125 | 0.125 | 0.062 | 0.062 | See Note 4 |
| A06 | 0.250 | 0.500 | 0.125 | 0.125 | 0.125 | 0.125 | |
| A08 | 0.250 | 0.875 | 0.125 | 0.125 | 0.125 | 0.125 | |
| A10 | 0.312 | 0.156 | 0.062 | 0.250 | 0.062 | 0.062 | See Note 4 |
| A12 | 0.312 | 0.240 | 0.062 | 0.250 | 0.062 | 0.062 | See Note 4 |
| A14 | 0.312 | 0.300 | 0.062 | 0.250 | 0.062 | 0.062 | See Note 4 |
| A16 | 0.312 | 0.500 | 0.187 | 0.125 | 0.125 | 0.125 | |
| A18 | 0.312 | 0.875 | 0.125 | 0.187 | 0.125 | 0.125 | |
| A20 | 0.312 | 1.000 | 0.125 | 0.187 | 0.125 | 0.125 | |
| A22 | 0.375 | 0.875 | 0.125 | 0.250 | 0.125 | 0.125 | |
| A24 | 0.375 | 1.000 | 0.125 | 0.250 | 0.125 | 0.125 | |
| A26 | 0.438 | 0.375 | 0.063 | 0.375 | 0.063 | 0.063 | See Note 4 |
| A28 | 0.438 | 0.500 | 0.125 | 0.313 | 0.125 | 0.125 | |
| A32 | 0.500 | 0.156 | 0.063 | 0.437 | 0.063 | 0.063 | See Note 4 |
| A34 | 0.500 | 0.500 | 0.125 | 0.375 | 0.125 | 0.125 | |
| A36 | 0.500 | 1.000 | 0.125 | 0.375 | 0.125 | 0.125 | |
| A38 | 0.500 | 1.000 | 0.250 | 0.250 | 0.250 | 0.250 | |
| A40 | 0.875 | 0.875 | 0.125 | 0.750 | 0.125 | 0.125 | |
| A42 | 1.000 | 1.000 | 0.250 | 0.750 | 0.250 | 0.250 |
TABLE IB. Channel dimensions – Style B.
| Config. Number | A (Inches) | B (Inches) | C (Inches) | D (Inches) | E (Inches) | F (Inches) | G (Inches) | H (Inches) | Notes |
|---|---|---|---|---|---|---|---|---|---|
| B02 | 0.188 | 0.188 | 0.063 | 0.125 | 0.063 | 0.063 | 0.031 | 0.031 | See Note 4 |
| B04 | 0.250 | 0.250 | 0.125 | 0.125 | 0.062 | 0.062 | 0.060 | 0.060 | See Note 4 |
| B08 | 0.312 | 0.500 | 0.187 | 0.125 | 0.125 | 0.125 | 0.120 | 0.120 | |
| B10 | 0.400 | 0.160 | 0.125 | 0.275 | 0.060 | 0.060 | 0.080 | 0.080 | See Note 4 |
| B12 | 0.500 | 0.500 | 0.125 | 0.375 | 0.125 | 0.125 | 0.188 | 0.188 | |
| B14 | 1.000 | 1.000 | 0.250 | 0.750 | 0.250 | 0.250 | 0.188 | 0.188 |
TABLE IC. Channel dimensions – Style C.
| Config. Number | A (Inches) | B (Inches) | C (Inches) | D (Inches) | E (Inches) | F (Inches) | G (Inches) | H (Inches) | J (Inches) | K (Inches) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C02 | 0.188 | 0.188 | 0.063 | 0.125 | 0.063 | 0.063 | 0.031 | 0.031 | 0.016 | 0.016 | See Note 4 |
| C04 | 0.250 | 0.250 | 0.064 | 0.186 | 0.102 | 0.102 | 0.064 | 0.064 | 0.023 | 0.023 | See Note 4 |
| C06 | 0.250 | 0.250 | 0.125 | 0.125 | 0.062 | 0.062 | 0.060 | 0.060 | 0.031 | 0.031 | See Note 4 |
| C10 | 0.312 | 0.500 | 0.187 | 0.125 | 0.125 | 0.125 | 0.120 | 0.120 | 0.060 | 0.060 | |
| C12 | 0.500 | 0.187 | 0.125 | 0.375 | 0.047 | 0.047 | 0.094 | 0.094 | 0.047 | 0.047 | See Note 4 |
| C14 | 0.500 | 0.500 | 0.125 | 0.375 | 0.125 | 0.125 | 0.188 | 0.188 | 0.080 | 0.080 | |
| C16 | 0.563 | 0.156 | 0.125 | 0.438 | 0.063 | 0.063 | 0.031 | 0.031 | 0.031 | 0.031 | See Note 4 |
| C18 | 0.938 | 0.250 | 0.063 | 0.875 | 0.063 | 0.063 | 0.125 | 0.125 | 0.063 | 0.063 | See Note 4 |
| C20 | 1.000 | 1.000 | 0.250 | 0.750 | 0.250 | 0.250 | 0.188 | 0.188 | 0.120 | 0.120 | |
| C22 | 1.250 | 0.875 | 0.250 | 1.000 | 0.250 | 0.250 | 0.188 | 0.188 | 0.062 | 0.062 |
TABLE ID. Channel dimensions – Style D.
| Config. Number | A (Inches) | B (Inches) | C (Inches) | D (Inches) | E (Inches) | F (Inches) | G (Inches) | H (Inches) | K (Inches) | L (Inches) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D02 | 0.165 | 0.600 | 0.062 | 0.041 | 0.062 | 0.188 | 0.188 | 0.062 | 0.050 | 0.050 | See Note 4 |
| D04 | 0.249 | 0.624 | 0.125 | 0.062 | 0.062 | 0.219 | 0.219 | 0.062 | 0.062 | 0.062 | See Note 4 |
| D06 | 0.281 | 1.000 | 0.125 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D08 | 0.281 | 1.250 | 0.125 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D10 | 0.437 | 1.375 | 0.250 | 0.062 | 0.125 | 0.312 | 0.312 | 0.125 | 0.125 | 0.125 | |
| D12 | 0.344 | 1.500 | 0.188 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D14 | 0.344 | 1.750 | 0.188 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D16 | 0.281 | 2.000 | 0.125 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D18 | 0.344 | 2.000 | 0.188 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D20 | 0.406 | 2.125 | 0.250 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D22 | 0.344 | 2.250 | 0.188 | 0.062 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D24 | 0.438 | 2.625 | 0.250 | 0.094 | 0.094 | 0.312 | 0.312 | 0.094 | 0.125 | 0.125 | |
| D26 | 0.469 | 3.062 | 0.250 | 0.094 | 0.125 | 0.375 | 0.375 | 0.125 | 0.156 | 0.156 |
TABLE II. Channel type, class, and grade.
| Classification Number | Classification of Requirements | ||
|---|---|---|---|
| 01 | Class 1 | Grade 30 | |
| 02 | Class 1 | Grade 40 | |
| 03 | Class 1 | Grade 50 | |
| 04 | Class 1 | Grade 60 | |
| 05 | Class 1 | Grade 70 | |
| 06 | Class 1 | Grade 80 | |
| 07 | Type A | Class 1 | Grade 30 |
| 08 | Type A | Class 2 | Grade 40 |
| 09 | Type A | Class 2 | Grade 50 |
| 10 | Type A | Class 2 | Grade 60 |
| 11 | Type A | Class 2 | Grade 70 |
| 12 | Type A | Class 2 | Grade 80 |
| 13 | Type B | Class 2 | Grade 30 |
| 14 | Type B | Class 2 | Grade 40 |
| 15 | Type B | Class 2 | Grade 50 |
| 16 | Type B | Class 2 | Grade 60 |
| 17 | Type B | Class 2 | Grade 70 |
| 18 | Type B | Class 2 | Grade 80 |
| 19 | Class 3 | Grade 30 | |
| 20 | Class 3 | Grade 40 | |
| 21 | Class 3 | Grade 50 | |
| 22 | Class 3 | Grade 60 | |
| 23 | Class 3 | Grade 70 | |
| 24 | Class 3 | Grade 80 | |
| 25 | Type A | Class 4 | Grade 30 |
| 26 | Type A | Class 4 | Grade 40 |
| 27 | Type A | Class 4 | Grade 50 |
| 28 | Type A | Class 4 | Grade 60 |
| 29 | Type A | Class 4 | Grade 70 |
| 30 | Type A | Class 4 | Grade 80 |
| 31 | Type B | Class 4 | Grade 30 |
| 32 | Type B | Class 4 | Grade 40 |
| 33 | Type B | Class 4 | Grade 50 |
| 34 | Type B | Class 4 | Grade 60 |
| 35 | Type B | Class 4 | Grade 70 |
| 36 | Type B | Class 4 | Grade 80 |
| 37 | Class 5 | Grade 30 | |
| 38 | Class 5 | Grade 40 | |
| 39 | Class 5 | Grade 50 | |
| 40 | Class 5 | Grade 60 | |
| 41 | Class 5 | Grade 70 | |
| 42 | Class 5 | Grade 80 | |
TABLE Ia. Class & Type
| Class/Type | Description |
|---|---|
| Class 1 | Fuel and petroleum oil resistant |
| Class 2 | Petroleum oil, weather, and ozone resistant |
| Class 3 | Non-oil resistant |
| Class 4 | Petroleum oil, weather, and ozone resistant (for use in contact with acrylic and polycarbonate plastics) |
| Class 5 | Non-oil resistant (for use in contact with acrylic and polycarbonate plastics) |
| Type A | High ozone concentration |
| Type B | Low ozone concentration |
Table III Channel length – L.
| Length Letter | L (Inches) |
|---|---|
| D | 48.000 |
| H | 168.000 |
Table IV Dimensional tolerances for channel.
| Dimensional Range (Inches) | Tolerance |
|---|---|
| 0.015 to 0.040 inclusive | ±0.005 inches |
| Over 0.041 to 0.062 inclusive | ±0.012 inches |
| Over 0.062 to 0.125 inclusive | ±0.016 inches |
| Over 0.125 to 0.187 inclusive | ±0.020 |
| Over 0.187 to 0.375 inclusive | ±0.031 |
| Over 0.375 to 0.562 inclusive | ±0.047 inches |
| Over 0.562 to 0.750 inclusive | ±0.063 |
| Over 0.750 to 1.000 | ±0.093 inches |
| 1.000 and over | ±10% dim. |
Metric Conversion Chart¹
| Inch | mm | Inch | mm | Inch | mm | Inch | mm | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.015 | 0.380 | 0.120 | 3.05 | 0.300 | 7.62 | 0.750 | 19.05 | |||
| 0.016 | 0.41 | 0.125 | 3.18 | 0.312 | 7.92 | 0.875 | 22.23 | |||
| 0.023 | 0.58 | 0.140 | 3.56 | 0.313 | 7.95 | 0.938 | 23.83 | |||
| 0.031 | 0.79 | 0.156 | 3.96 | 0.343 | 8.71 | 1.000 | 25.40 | |||
| 0.041 | 1.04 | 0.160 | 4.06 | 0.344 | 8.74 | 1.250 | 31.75 | |||
| 0.047 | 1.19 | 0.165 | 4.19 | 0.375 | 9.53 | 1.375 | 34.93 | |||
| 0.050 | 1.27 | 0.186 | 4.72 | 0.400 | 10.16 | 1.500 | 38.10 | |||
| 0.060 | 1.52 | 1.87 | 4.75 | 0.406 | 10.31 | 1.750 | 44.45 | |||
| 0.062 | 1.57 | 0.188 | 4.78 | 0.437 | 11.10 | 2.000 | 50.80 | |||
| 0.063 | 1.60 | 0.219 | 5.56 | 0.438 | 11.13 | 2.125 | 53.98 | |||
| 0.064 | 1.63 | 0.234 | 5.94 | 0.469 | 11.91 | 2.250 | 57.15 | |||
| 0.078 | 1.98 | 0.240 | 6.10 | 0.500 | 12.70 | 2.625 | 66.68 | |||
| 0.080 | 2.03 | 0.249 | 6.32 | 0.531 | 13.49 | 3.062 | 77.77 | |||
| 0.094 | 2.39 | 0.250 | 6.35 | 0.563 | 14.30 | 48.000 | 1219.20 | |||
| 0.102 | 2.59 | 0.275 | 6.99 | 0.600 | 15.24 | 168.000 | 4267.20 | |||
| 0.109 | 2.77 | 0.281 | 7.14 | 0.624 | 12.85 |
¹Metric equivalents are given for general information only.
GENERAL NOTES TO TABLES:
- Dimensions are in inches.
- Metric equivalents are given for general information only.
- Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5 synthetic rubber.
- These channel configurations shall apply only for synthetic rubber grades 50, 60, 70, and 80 of MIL-PRF-6855.
- This information is based upon the Performance Specification Sheet – Rubber, Synthetic, Channel, Extruded as of September 2023. To find more information, visit http://assist.dla.mil
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