MIL-PRF-6855 Sheets, Strips, Tubes, and U-Channels Specifications

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Slightly Unrolled Black Rubber Sheet Roll

RUBBER, SYNTHETIC, SHEETS (M6855/1)

RUBBER, SYNTHETIC, STRIP (OR TAPE)
(M6855/2)

RUBBER, SYNTHETIC, TUBING
(M6855/4)

RUBBER SYNTHETIC, U-CHANNEL, EXTRUDED
(M6855/5)

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MIL-PRF-6855/1 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

M 6855 / 1 = XX XX X X
Prefix for Military Specification Specification Number Specification Sheet Number Two-Digit Classification Number
(table I)		 Two-Digit Thickness Number
(table II)		 One-Digit Length Number
(table III)		 One-Digit Width Number
(table IV)

Example: M6855/1-010423

Slightly Unrolled Black Rubber Sheet Roll

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.

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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 2 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:

  1. Dimensions are in inches.
  2. Metric equivalents are given for general information only.
  3. Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5 synthetic rubber sheets.
  4. 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

MIL-PRF-6855/2 Rubber Strip

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

M 6855 / 2 = XX X X XX
Prefix for Military Specification Specification Number Specification Sheet Number Two-Digit Classification Number
(table I)		 One-Digit Thickness Letter
(table II)		 One-Digit Length Number
(table III)		 Two-Digit Width Number
(table IV)

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.

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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 2 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:

  1. Dimensions are in inches.
  2. Metric equivalents are given for general information only.
  3. Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5.
  4. 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

MIL-PRF-6855/4 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

M 6855 / 4 = XX XXX X
Prefix for Military Specification Specification Number Specification Sheet Number Two-Digit Classification Number
(table I)		 Three-Digit Size Number (table IIA, IIB, or IIC) One-Digit Length Number
(table III)

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.

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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 2 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:

  1. Dimensions are in inches.
  2. Metric equivalents are given for general information only.
  3. Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5 synthetic rubber sheets.
  4. 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

MIL-PRF-6855/4 Rubber U-Channel

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

M 6855 / 5 = XXX XX X
Prefix for Military Specification Specification Number Specification Sheet Number Three-Digit Configuration Number (table IA, IB, IC, or ID, as applicable) Two-Digit Classification Number
(table II)		 One-Digit Length Letter
(table III)

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.

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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 2 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:

  1. Dimensions are in inches.
  2. Metric equivalents are given for general information only.
  3. Use of this specification sheet for US Army Communications-Electronics Command is restricted to Class 4 and Class 5 synthetic rubber.
  4. These channel configurations shall apply only for synthetic rubber grades 50, 60, 70, and 80 of MIL-PRF-6855.
  5. 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