Product Description

Nitrile MIL-R-6855 / MIL-PRF-6855 Class 1

A military grade nitrile product that has been designed to meet the nitrile MIL-R-6855 / MIL-PRF-6855 Class 1 Specification serving as a fuel resistant rubber material.

MIL-R-6855 Class 1 is equivalent to MIL-PRF-6855 Class 1. Made in the USA.

Samples available upon request.

Product Image

Key Aspects

Temperature Range:-50°F to +220°F
Durometer Range (Shore A ± 5):40 to 80
Tensile Range (typical):1500 psi to 2100 psi
Elongation Range (typical):200% to 600%
Finishes Available:Smooth
Talc:Talc-Free Available
Specification:MIL-R-6855 Class 1 / MIL-PRF-6855 Class 1
Compound Number(s)Part Number(s)
040P04710044222957004422296000442229640044222972
0044222974004422297600442295340044256009
0044262738004426273900442627400044262742
00442627430044262745
050P04720044223496004422349800442265910044226992
0044227013004426274800442627490044262760
0044262761004426276200442627630044262764
00442627650044262766
060P04730044224304004422430900442243110044224315
0044224318004422432100442243270044224330
0044224331004422433400442243360044262767
00442627680044262769
070P04740044224901004422490400442249060044224907
0044225662004422764800442346150044262770
0044262771004426277200442627730044262774
00442627750044262776
080P04750044262777004426277800442627790044262780
0044262781004426278200442627830044262784
0044262785004426278600442627870044262788
00442627890044262790

We comply with the Buy American Act requirements.

Advanced Technical Details

SpecificationDurometer
Hardness
(Shore A ± 5)
Thickness
(inches)
Width
(inches)
TensileUltimate
Elongation
Temperature
Range
Estimated Weight
Per Linear Foot
(1/8″ x 36″)
TypicalTypical
MIL-R-6855 / MIL-PRF-6855
Class 1 Grade 40
401/64 – 1/436, 481500 psi600%-50°F to +220°F2.15 lb
MIL-R-6855 / MIL-PRF-6855
Class 1 Grade 50
501/64 – 1/436, 481800 psi550%-50°F to +220°F2.38 lb
MIL-R-6855 / MIL-PRF-6855
Class 1 Grade 60
601/64 – 1/436, 482100 psi500%-50°F to +220°F2.42 lb
MIL-R-6855 / MIL-PRF-6855
Class 1 Grade 70
701/64 – 1/436, 482000 psi300%-50°F to +220°F2.5 lb
MIL-R-6855 / MIL-PRF-6855
Class 1 Grade 80
801/64 – 1/436, 481800 psi200%-50°F to +220°F2.46 lb

*Physicals are presented in typical values – we certify to the minimum value

Compound Number: 040P0471(40P471), 050P0472(50P472), 060P0473(60P473), 070P0474(70P474), 080P0475(80P475)

Unsure on how to read our compound number? Read the page, “How to Read a Compound Number”.

General Information for WARCO Sheet Rubber

Rubber Roll Width

WARCO Sheet rubber rolls are available in 36” or 48” width. Custom widths available up to 55″. Rolls are untrimmed and can measure approximately 3” in additional width. Trimmed rolled rubber is available upon request.

Custom widths are available, please call (714-532-3355) for details.

Standard Minimum Order Quantity

The minimum order quantity for a standard WARCO Sheet rubber is one roll. For custom applications, please call (714-532-3355) for more information.

Rubber Roll Lengths

Standard Roll approximate length ±10%. Products may vary, please see product listing for standard roll lengths.

Sheet Roll Lengths:

  • 1/64″ thick – 180 feet
  • 1/32” thick – 150 feet
  • 1/16” thick – 100 feet
  • 3/32” thick – 65 feet
  • 1/8” thick – 50 feet
  • 3/16” thick – 30 feet
  • 1/4” thick – 25 feet
  • 5/16” thick – 20 feet
  • 3/8” thick – 16.5 feet
  • 1/2” thick – 12.5 feet

Sheet Rubber Thickness Tolerances

Closer tolerances and Custom thicknesses are available and can be priced on request.

WARCO Thickness Tolerance – Standard RMA

  • 0.031” & thinner: ± 0.010″
  • 0.032″ to 0.061″: ± 0.012″
  • 0.062″ to 0.124″: ± 0.016″
  • 0.125″ to 0.186″: ± 0.020″
  • 0.187″ to 0.374″: ± 0.031″
  • 0.375″ to 0.500″: ± 0.047″
  • 0.501″ to 0.750″: ± 0.094″
  • 0.751″ & thicker: ± 10%

Sheet Rubber Finish

Unless otherwise noted, sheet rubber has a standard smooth finish. Textured (fabric) finish and matte finish are available on most materials at an additional cost. Please call for details.

Sheet Rubber Color

The standard color of our sheet rubber is black, unless noted otherwise. Custom colors and color matching is available.

Test Reports

Short form test results, basic physicals, are available upon request at the time of the order. Full test reports for particular specifications will be also quoted on request. This may include certifying the ozone resistance, heat ageing, compliances, and many more aspects of our product. Certifications are sent with your order upon request at no charge.

More information about the WARCO products is available at General Product Information.

In addition to the previously mentioned specification, we also offer a comprehensive list of tables and explanations relating to the MIL-PRF-6855 specifications for rubber sheet, rubber strips, rubber extruded tubing, and rubber extruded u channels. Learn more at this link.

Our rubber products are a proprietary blend of various polymers formulated to meet stated physicals and specifications. The named product polymer is not necessarily the primary polymer representing the highest percentage of the polymer blend. Determination of the suitability of the goods for the uses and applications contemplated by Buyer and others shall be the sole responsibility of the Buyer or user. No guaranty is given with respect to length of service on any particular application. Suggestions or recommendations made by Seller in its product literature concerning uses or applications of the goods are believed to be reliable, but Seller makes no warranty or guaranty of results to be obtained since the conditions of the use and application by Buyer and others are beyond Seller’s control. The specification listed here, MIL, represents the United States Military Departments and the Defense Agencies’ standardization documents that have been developed and used for products, materials, and processes that have multiple applications to promote commonality and interoperability and to limit the variety of items in the military supply system. Their website can be found here: https://www.dsp.dla.mil/Specs-Standards/.

View complete Terms & Conditions of Sale for suitability of use and formulations

Other Military Specification Grade Sheet Rubber Products

Nitrile MIL-G-1149

  • Polymer: Nitrile
  • Durometer: 50
  • Temperature Range: -40°F to +200°F
  • Specs: MIL-G-1149 Type 1 Class 5

MIL-R-6855 Class 2

  • Polymer: Neoprene
  • Durometer: 30 to 80
  • Temperature Range: -50°F to +220°F
  • Specs: MIL-R-6855 Class 2

MIL-R-2765

  • Polymer: Nitrile
  • Durometer: 40
  • Temperature Range: -50°F to +220°F
  • Spec: MIL-R-2765

MIL-R-21252 / MIL-DTL-21252

  • Polymer: EPDM
  • Durometer: 85
  • Temperature Range: -40°F to +220°F
  • Specs: MIL-R-21252 / MIL-DTL-21252