Fluorozone® Mil-Spec Performance FKM AMS 3216 / MIL-R-83248C
Fluorozone Mil-Spec Performance FKM is a 75 durometer Shore A fluoroelastomer (FKM/Viton®-family) sheet rubber formulated to meet the AMS 3216 specification (supersedes MIL-R-83248) and qualified to MIL-R-83248C Type II Class 1. The compound delivers 1850 psi typical tensile strength and 150% typical ultimate elongation across an operating temperature range of -20°F to +500°F. Compared to Fluorozone Premium Performance grade, this material exhibits a higher temperature range and increased tensile strength, with strong resistance to aliphatic hydrocarbon fluids, oils, fuels, lubricants, and most mineral acids.
Key Properties
- Durometer Hardness: 75 Shore A (± 5)
- Tensile Strength: 1600 psi minimum / 1850 psi typical
- Ultimate Elongation: 125% minimum / 150% typical
- Operating Temperature: -20°F to +500°F
- Available Thickness: Rolls 1/64″ – 1/4″; Molded Sheets up to 4″
Estimated Weight (1/8″ × 36″): 3.55 lb per linear foot
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Durometer Hardness | 75 Shore A (± 5) | — |
| Compound Number | 075F0212 | — |
| Available Thickness — Rolls | 1/64″ – 1/4″ | — |
| Available Thickness — Molded Sheets | Up to 4″ | — |
| Standard Roll Widths | 36″, 48″ (custom up to 55″) | — |
| Estimated Weight (1/8″ × 36″) | 3.55 lb per linear foot | — |
| Standard Finish | Smooth (talc present) | — |
| Standard Color | Black | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength — Minimum | 1600 psi | — |
| Tensile Strength — Typical | 1850 psi | — |
| Ultimate Elongation — Minimum | 125% | — |
| Ultimate Elongation — Typical | 150% | — |
Thermal Properties
| Property | Value | Test Method |
| Operating Temperature | -20°F to +500°F | — |
Chemical Resistance
| Property | Value | Test Method |
| Aliphatic Hydrocarbon Fluids | Very good resistance | — |
| Oils | Resistant (broad range) | — |
| Fuels | Resistant (broad range) | — |
| Lubricants | Resistant (broad range) | — |
| Mineral Acids | Resistant to most | — |
Dimensional Tolerances — Standard RMA
| Property | Value | Test Method |
| Thickness Tolerance, 0.031″ & thinner | ± 0.010″ | RMA |
| Thickness Tolerance, 0.032″ to 0.061″ | ± 0.012″ | RMA |
| Thickness Tolerance, 0.062″ to 0.124″ | ± 0.016″ | RMA |
| Thickness Tolerance, 0.125″ to 0.186″ | ± 0.020″ | RMA |
| Thickness Tolerance, 0.187″ to 0.374″ | ± 0.031″ | RMA |
| Thickness Tolerance, 0.375″ to 0.500″ | ± 0.047″ | RMA |
| Thickness Tolerance, 0.501″ to 0.750″ | ± 0.094″ | RMA |
| Thickness Tolerance, 0.751″ & thicker | ± 10% | RMA |
| Standard Roll Length Tolerance | ± 10% (approximate) | — |
Standard Roll Lengths (Approximate ± 10%)
| Property | Value | Test Method |
| 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 | — |
| 5/16″ thick | 35 feet | — |
| 1/4″ thick | 25 feet | — |
| 5/16″ thick | 20 feet | — |
| 3/8″ thick | 16.5 feet | — |
| 1/2″ thick | 12.5 feet | — |
Compliance
- AMS 3216G — Compliant
- MIL-R-83248C — Compliant (Type II Class 1)
- Buy American Act — Compliant
- Made in the USA
- Aerospace and military sealing components
- High-temperature sealing and gasketing
- Fuel and lubricant resistant components
- Chemical and acid exposure environments
- Sheet rubber fabrication for AMS 3216 specification work
Common industries: aerospace, military, defense, and industrial chemical processing.
Fluorozone Mil-Spec Performance FKM is a high-performance fluoroelastomer (FKM/Viton®-family) sheet rubber within the Fluorozone product line, formulated to meet AMS 3216 — which supersedes MIL-R-83248 — and qualified to MIL-R-83248C Type II Class 1. The 75 Shore A material is positioned for aerospace, military, and high-temperature industrial sealing applications, and is the higher-temperature, higher-tensile counterpart to Fluorozone Premium Performance grade.
The compound delivers 1850 psi typical tensile strength (1600 psi minimum) and 150% typical ultimate elongation (125% minimum), with an operating temperature range of -20°F to +500°F. Fluorozone exhibits very good resistance to many aliphatic hydrocarbon fluids that can dissolve other types of rubber, along with resistance to a broad range of oils, fuels, lubricants, and most mineral acids.
The material is supplied with a standard smooth finish and contains talc as a processing aid; textured (fabric) and matte finishes are available on most materials at additional cost. Roll widths are offered at 36″ or 48″ untrimmed (with up to approximately 3″ of additional width), with custom widths available up to 55″ and trimmed rolls available on request. Molded sheets are available up to 4″ thick.
Thickness tolerances follow standard RMA classifications; closer tolerances and custom thicknesses can be priced on request. Manufactured in the USA.
Compliant with AMS 3216G, MIL-R-83248C Type II Class 1, and the Buy American Act.
What differentiates Fluorozone Mil-Spec Performance FKM from Fluorozone Premium Performance grade?
Fluorozone Mil-Spec Performance FKM exhibits a higher temperature range — up to +500°F — and increased tensile strength compared to the Premium Performance grade. It is also qualified to AMS 3216 (which supersedes MIL-R-83248) and MIL-R-83248C Type II Class 1, making it the appropriate choice when the application requires documented mil-spec compliance and the elevated thermal and mechanical performance that comes with it.
Why is chemical resistance critical for this material?
The defining function of an FKM such as Fluorozone is sustained sealing performance in contact with aggressive fluids that dissolve or degrade other elastomers. Many aliphatic hydrocarbon fluids will swell or break down general-purpose rubber, leading to seal failure and contamination. Fluorozone Mil-Spec is formulated to provide very good resistance to those fluids along with a broad range of oils, fuels, lubricants, and most mineral acids, which is why it is specified for fuel system, lubrication, and chemical-exposure sealing.
What is the operating temperature range for Fluorozone Mil-Spec Performance FKM?
The operating temperature range is -20°F to +500°F.
Is Fluorozone Mil-Spec Performance FKM suitable for aerospace, military, and Buy American Act–regulated environments?
Yes. The material is manufactured in the USA, complies with the Buy American Act, and is qualified to AMS 3216G and MIL-R-83248C Type II Class 1, making it suitable for aerospace, military, defense, and federal procurement applications calling out those standards.
How should Fluorozone Mil-Spec Performance FKM be specified?
Specify grade (Fluorozone Mil-Spec Performance FKM, compound 075F0212), thickness (roll or molded sheet), roll width, finish (smooth, textured/fabric, or matte), trimmed or untrimmed rolls, dimensional tolerances, compliance requirements (AMS 3216G and/or MIL-R-83248C Type II Class 1), and finished format.
