PTFE (Teflon®) Washers.
We die-cut virgin, glass-filled, and carbon-filled PTFE washers at our Fontana, California plant under ISO 9001. Share OD, ID, thickness, PTFE grade, and annual quantity. Cannon Gasket quotes pricing, tooling cost if needed, and lead time.
- Bolt isolation, the lowest friction coefficient of any polymer, and near-total chemical indifference, all from one die-cut part.
- Semiconductor fab lines, chemical plants, pharma equipment, food-contact gear, aerospace fuel systems, and high-temp electrical assemblies all run PTFE washers.
- PTFE is polytetrafluoroethylene. The service window runs -450 F to +500 F, and virgin grades carry FDA approval.
Request a quote for PTFE washers.
Why specify PTFE for precision washers?
PTFE (polytetrafluoroethylene), known commercially as Teflon®, is chemically inert and the most chemically resistant solid polymer available. Cannon Gasket manufactures precision die-cut PTFE washers for applications where exposure to aggressive chemicals, extreme temperatures, or both would destroy other materials. We stock Virgin Grade PTFE sheeting and continuous rolls per AMS 3652C, plus filled grades including glass-filled, carbon-filled, and bronze-filled compounds, sourced from leading US mills. Our in-house tool and die capabilities let us cut both standard and custom, tight-tolerance washers, and we slit or shear PTFE sheeting to almost any width or length.
PTFE at-a-glance properties
- Temperature Range: -450°F to +500°F
- Chemical Resistance: Chemically inert. Resists acids, bases, solvents, fuels
- Friction: Low friction coefficient, lowest of any solid material
- Wear and Dielectric: Low wear, excellent dielectric properties
- Standards: Virgin Grade per AMS 3652C; FDA 21 CFR 177.1550 compliant
- Thicknesses: 0.002" to 0.250" sheet and continuous roll
Where PTFE washers show up
- Chemical processing equipment
- Food and pharmaceutical machinery
- Semiconductor fabrication
- Aerospace fuel and hydraulic systems
- Electrical insulation and lighting
- High-temperature oven and autoclave seals
- Automotive, controls, and valves
- Pumps, irrigation, pools and spas
- Medical devices and bearings
Virgin vs Filled PTFE
Virgin PTFE delivers the highest chemical purity and is the correct specification for FDA, pharmaceutical, and semiconductor applications. Glass-filled PTFE improves wear resistance and dimensional stability under load at some cost to chemical resistance. Carbon-filled PTFE adds electrical conductivity, creep resistance, and thermal conductivity. Our engineering team can advise on the appropriate grade for your operating environment.
PTFE washer tolerances & finishing options
Standard die-cut tolerance on PTFE is ±0.005\" to ±0.010\" on outside diameter and inside diameter, depending on thickness and filler content. Tighter tolerances are available on skived sheet stock. PSA (pressure-sensitive adhesive) backing, custom packaging, and cleanroom assembly are available on request. PTFE washers run from low to high volume orders with low minimum requirements, and stock material typically ships in three to five days. Special orders and challenges are always welcome.
Stocking programs for OEM production
Many original equipment manufacturers use Cannon Gasket PTFE washers in initial production for their dependability, backed by customer stocking programs and guaranteed deliveries. Our highly experienced sales staff works with customers to create products that meet specific, and sometimes unusual, requirements.