Fluorosilicone Rubber Washers

Fluorosilicone (FVMQ) combines silicone's broad temperature range with fluorocarbon-grade chemical resistance. Cannon Gasket die-cuts custom fluorosilicone washers for aviation fuel-system sealing, defense hardware, semiconductor processing, and chemical contact applications.

Durometer
10A to 90A
Highlight
Fuel & oil resistant
Custom Fluorosilicone rubber washers from Cannon Gasket
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Request a quote for Fluorosilicone rubber washers.

Properties of Fluorosilicone rubber washers

Cannon Gasket cuts Fluorosilicone rubber washers to your specifications in durometers ranging from 10A to 90A Shore hardness. Fluorosilicone exhibits resistance to fuels, oils, aromatic solvents, ozone, oxidizing chemicals, and chlorinated solvents.

Fluorosilicone tolerances and customization

Standard dimensional tolerances on Fluorosilicone rubber washers land around ±0.010" to ±0.015" on OD and ID, depending on material durometer and thickness. Tighter tolerances are available on selected grades. Cannon Gasket cuts Fluorosilicone to custom profiles in-house and matches lead times to your production volume. PSA backing, pad printing, custom packaging, and kitting are all on the menu when you need them.

How Fluorosilicone Performs in Washer Applications

- Resistant to fuels, oils, aromatic hydrocarbons, and many oxidizing chemicals. - Retains silicone's flexibility across the thermal range.

Common Washer Applications

Aerospace fuel-system bolt sealing washers, defense hardware seals, aviation hydraulics, semiconductor process equipment, and any application where silicone's temperature range is needed but chemical exposure rules out plain silicone.

When Another Material Is the Better Specification

Silicone when chemical contact is not a concern (more economical). Buna-N at moderate temperatures with oil only.

Manufacturing Methods

Die-cut, lathe-cut. Clean room production available.

Standard sizes, tolerances & manufacturing

Precision & tooling: Capable of holding tolerances as tight as ±.001" on critical dimensions when required, beyond the ±0.010" to ±0.015" standard. Short- and long-run capabilities. All parts available with pressure-sensitive adhesive (PSA) on one or two sides.

Clean room: Cannon Gasket offers clean-environment stamping for medical, FDA, electronic, and scientific applications where a controlled level of particulate is required, with capabilities to meet ISO Class 10,000.

Stocking agreements: Blanket orders, VMI (vendor-managed inventory), JIT (just-in-time), and Kanban replenishment programs.

Pad printing: Pad print your part number, identification marking, or company name in a range of ink colors. Marking per customer specifications or MIL-STD-130.

Packaging: Parts are bagged and tagged in specified quantities and labeled with P/N or any required information. Capability to meet specific packaging and labeling requirements.

Standard Screw Size Rubber Washers

Screw SizeOutside DiameterInside DiameterThickness
#6 Standard0.250"0.120"0.015" – 0.250"
#6 Option0.375"0.120"0.015" – 0.250"
#8 Standard0.312"0.150"0.015" – 0.250"
#8 Option0.438"0.150"0.015" – 0.250"
#10 Standard0.375"0.170"0.015" – 0.250"
#10 Option0.500"0.170"0.015" – 0.250"
#12 Standard0.437"0.195"0.015" – 0.250"
#12 Option0.562"0.195"0.015" – 0.250"
#14 Standard0.500"0.230"0.015" – 0.250"
#14 Option0.625"0.230"0.015" – 0.250"
5/16" Standard0.562"0.290"0.015" – 0.250"
5/16" Option0.688"0.290"0.015" – 0.250"
3/8" Standard0.625"0.355"0.015" – 0.250"
3/8" Option0.812"0.355"0.015" – 0.250"
1/2" Standard1.062"0.490"0.015" – 0.250"
3/4" Standard1.500"0.740"0.015" – 0.250"

Standard RMA Thicknesses and Tolerances for Elastomers

Nominal ThicknessTolerance
0.015"±0.010"
0.031"±0.012"
0.062"±0.016"
0.093"±0.016"
0.125"±0.020"
0.187"±0.031"
0.250"±0.031"
0.375"±0.047"
0.500"±0.047"

Standard references shown. Cannon Gasket also cuts custom outside diameters, inside diameters, and thicknesses to your drawing. Send your specifications for a quote.

Frequently Asked Questions

Common Fluorosilicone questions.

Are you ISO 9001 certified?
Yes, ISO 9001:2015 certified. Documented quality management covers incoming material verification, in-process inspection, calibrated measurement, final inspection, non-conformance handling, corrective action, and full lot traceability. AS9100-ready for aerospace, with MIL-spec and FDA 21 CFR 177.2600 / USP Class VI grades available on request.
What OD / ID / thickness ranges are available?
Standard die-cut range: 0.125 inch to 12 inch OD, 0.060 inch to 10 inch ID, 0.030 inch to 0.500 inch thickness. Larger, smaller, or thicker parts quoted on request.
What durometer should I specify for a rubber washer?
Softer (40A Shore) seals better on rough or misaligned surfaces at lower bolt load. Harder (70-80A) handles higher bolt load without extruding. For most fastener sealing, 60-70A is the starting point.
Which compound holds up outdoors?
EPDM excels at weather, ozone, UV, water, and steam. Neoprene is more balanced if you also need oil resistance. Nitrile fails in outdoor service and should not be specified for UV-exposed parts.
Which compound resists oil and fuel?
Buna-N / Nitrile is the default for petroleum oils, fuels, hydraulic fluids, and most industrial chemicals at moderate temperatures. For aggressive chemicals or temperatures above 250°F, step up to Viton or Fluorosilicone.
How fast do you return a quote?
Most RFQs come back within one business day. Simple profile updates to an existing tool quote same-day. Send a drawing, DXF, or competing part number and our engineering team reviews material, tolerance, and volume before pricing.
What is the minimum order quantity?
Minimums depend on the part and material. We cut prototype and first-article quantities for engineering evaluation, then scale up to production volumes from the same tooling. For high-volume programs we run JIT, VMI, and Kanban replenishment out of Fontana, California.
What should I send with an RFQ?
Ideal: a drawing or DXF, material spec (or compound family), estimated annual volume, and any regulatory callouts (FDA, USP Class VI, AS9100, MIL-spec). If you only have a sample or a part number from a competing supplier, send that and we will reverse-engineer the spec before quoting.
What are typical lead times?
Prototype and first-article parts usually ship in 5-10 business days. Production runs from existing tooling are 2-3 weeks depending on volume and material lead time. Rush and expedite options available on a case-by-case basis.
Need custom Fluorosilicone washers?
From prototype to production, any size, any volume.
ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971