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

M6855/1=XXXXXX
Prefix for Military SpecificationSpecification NumberSpecification Sheet NumberTwo-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 NumberClassification of Requirements
01Class 1Grade 30
02Class 1Grade 40
03Class 1Grade 50
04Class 1Grade 60
05Class 1Grade 70
06Class 1Grade 80
07Type AClass 1Grade 30
08Type AClass 2Grade 40
09Type AClass 2Grade 50
10Type AClass 2Grade 60
11Type AClass 2Grade 70
12Type AClass 2Grade 80
13Type BClass 2Grade 30
14Type BClass 2Grade 40
15Type BClass 2Grade 50
16Type BClass 2Grade 60
17Type BClass 2Grade 70
18Type BClass 2Grade 80
19Class 3Grade 30
20Class 3Grade 40
21Class 3Grade 50
22Class 3Grade 60
23Class 3Grade 70
24Class 3Grade 80
25Type AClass 4Grade 30
26Type AClass 4Grade 40
27Type AClass 4Grade 50
28Type AClass 4Grade 60
29Type AClass 4Grade 70
30Type AClass 4Grade 80
31Type BClass 4Grade 30
32Type BClass 4Grade 40
33Type BClass 4Grade 50
34Type BClass 4Grade 60
35Type BClass 4Grade 70
36Type BClass 4Grade 80
37Class 5Grade 30
38Class 5Grade 40
39Class 5Grade 50
40Class 5Grade 60
41Class 5Grade 70
42Class 5Grade 80

 

TABLE Ia. Class & Type

Class/TypeDescription
Class 1Fuel and petroleum oil resistant
Class 2Petroleum oil, weather, and ozone resistant
Class 3Non-oil resistant
Class 4Petroleum oil, weather, and ozone resistant (for use in contact with acrylic and
polycarbonate plastics)
Class 5Non-oil resistant (for use in contact with acrylic and polycarbonate plastics)
Type AHigh ozone concentration
Type BLow ozone concentration

TABLE II. Sheet thickness – T.

Sheet Thickness NumberT (Inches)
040.015
080.031
120.062
160.094
200.125
240.156
280.187
320.250
360.312
400.375
440.438
480.500
520.562
560.625
600.750
640.875
681.000
721.250
761.500

TABLE III. Sheet length – L.

Sheet Length NumberL (Inches)
124.000
236.000
348.000
460.000
572.000
6120.000
7144.000
8300.000

TABLE IV. Sheet width – W.

Width NumberW (Inches)
112.000
318.000
524.000
736.000
940.000

Metric Conversion Chart¹

InchmmInchmm
0.0150.380.87522.23
0.0310.791.00025.40
0.0621.571.25031.75
0.0942.391.50038.10
0.1253.1812.000304.80
0.1563.9618.000457.20
0.1874.7524.000609.60
0.2506.3536.000914.40
0.3127.9240.0001016.00
0.3759.5248.0001219.20
0.43811.1360.0001524.00
0.50012.7072.0001828.80
0.56714.27120.0003048.00
0.62515.88144.0003657.60
0.75019.05300.0007620.00

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

M6855/2=XXXXXX
Prefix for Military SpecificationSpecification NumberSpecification Sheet NumberTwo-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 NumberClassification of Requirements
01Class 1Grade 30
02Class 1Grade 40
03Class 1Grade 50
04Class 1Grade 60
05Class 1Grade 70
06Class 1Grade 80
07Type AClass 1Grade 30
08Type AClass 2Grade 40
09Type AClass 2Grade 50
10Type AClass 2Grade 60
11Type AClass 2Grade 70
12Type AClass 2Grade 80
13Type BClass 2Grade 30
14Type BClass 2Grade 40
15Type BClass 2Grade 50
16Type BClass 2Grade 60
17Type BClass 2Grade 70
18Type BClass 2Grade 80
19Class 3Grade 30
20Class 3Grade 40
21Class 3Grade 50
22Class 3Grade 60
23Class 3Grade 70
24Class 3Grade 80
25Type AClass 4Grade 30
26Type AClass 4Grade 40
27Type AClass 4Grade 50
28Type AClass 4Grade 60
29Type AClass 4Grade 70
30Type AClass 4Grade 80
31Type BClass 4Grade 30
32Type BClass 4Grade 40
33Type BClass 4Grade 50
34Type BClass 4Grade 60
35Type BClass 4Grade 70
36Type BClass 4Grade 80
37Class 5Grade 30
38Class 5Grade 40
39Class 5Grade 50
40Class 5Grade 60
41Class 5Grade 70
42Class 5Grade 80

 

TABLE Ia. Class & Type

Class/TypeDescription
Class 1Fuel and petroleum oil resistant
Class 2Petroleum oil, weather, and ozone resistant
Class 3Non-oil resistant
Class 4Petroleum oil, weather, and ozone resistant (for use in contact with acrylic and
polycarbonate plastics)
Class 5Non-oil resistant (for use in contact with acrylic and polycarbonate plastics)
Type AHigh ozone concentration
Type BLow ozone concentration

TABLE II. Strip thickness – T.

Strip Thickness LetterT (Inches)
A0.015
E0.031
H0.062
J0.093
L0.125
N0.187
P0.250
R0.375
T0.500
W0.625
Y1.000

TABLE III. Strip length – L.

Strip Length NumberL (Inches)
112.000
224.000
336.000
460.000
5144.000
6300.000
7900.000

TABLE IV. Strip width – W.

Strip Width NumberW (Inches)
020.250
040.500
060.750
081.000
101.250
121.500
141.750
162.000
183.000
204.000
225.000
246.000

Metric Conversion Chart¹

InchmmInchmm
0.0150.381.75044.45
0.0310.792.00050.80
0.0621.573.00076.20
0.0932.364.000101.60
.01253.185.000127.00
0.1874.756.000152.40
0.2506.3512.000304.80
0.3759.5324.000609.60
0.50012.7036.000914.40
0.62515.8860.0001524.00
0.75019.05144.0003657.60
1.00025.40300.0007620.00
1.25031.75900.00022860.00
1.50038.10

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

M6855/4=XXXXXX
Prefix for Military SpecificationSpecification NumberSpecification Sheet NumberTwo-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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