Rubber Washer 4" OD x 7/16" ID x 1/4" Thick
4" OD × 7/16" ID × 1/4" Thick — Neoprene, EPDM, Nitrile, Silicone, Natural Rubber, Viton & Fiber
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Rubber Washer 4" OD x 7/16" ID x 1/4" Thick - EPDM is backordered and will ship as soon as it is back in stock.
Our 4" OD x 7/16" ID x 1/4" thick rubber washer is cut to spec and offered in seven compounds, from potable-water-safe to chemical-resistant. Exact dimensions: 4" (101.6 mm) OD, 0.438" (11.1 mm) ID, 0.25" (6.4 mm) thick.
- Outside diameter (OD): 4" (101.6 mm)
- Inside diameter (ID): 7/16" (11.1 mm)
- Thickness: 1/4" (6.4 mm)
- Materials: Neoprene, EPDM, Nitrile, Silicone, Natural Rubber, Viton, Fiber
At a full 1/4" thick it works as a cushioning, load-spreading washer for vibration, impact and standoff jobs. The 7/16" inside diameter fits over roughly a 7/16" bolt or rod, and the 4" outside diameter gives a wide bearing surface to spread load and seal.
Available in all seven materials. Hit 50+ units across any sizes and bulk pricing kicks in automatically.
See all 4" OD rubber washers, or use our washer measuring guide to confirm your size.
Rubber Washer Application & Uses
Rubber Washer Application & Uses
Plumbing and Water Systems:
- Bathroom Sink Drain
- Bathtub Drain
- Bathtub Faucet
- Faucet Supply Line
- Hydrant Valve Sealing
- Kitchen Sink Plug
Household Applications:
- Dishwasher Hose Connection
- Washing Machine Hose
- Kegerator Sealing
- Coffee Machine Maintenance
- Refrigeration Units
- Vacuum Cleaner Fittings
Outdoor and Gardening:
- Garden Hose Connections
- Outdoor Faucet
- Outside Tap Sealing
- Lawn Mower Engine Seals
- Irrigation Systems
- Pool Plumbing
Transportation and Machinery:
- Bicycle Components
- Boat Sealing
- Tractor Maintenance
- Automotive Oil Drain Plug
- Sports Equipment Maintenance
- Pressure Washer Fittings
Construction and Industrial:
- Bolt Sealing
- Bottle Trap Sealing
- Metal Bed Frame Cushioning
- Ceiling Fan Blade Stability
- Lighting Fixture Stability
- Metal Beds Stabilization
Electronics and Computing:
- Motherboard Insulation
- Electrical Insulation in Appliances
- Home Heating System Connections
- Large Scale Industrial Use
- Door Hinge Cushioning
- Water Filtration Systems
Miscellaneous:
- License Plate Stabilization
- Lock Sealing
- Delta Faucet Sealing
- Kitchen Mixer Tap
- Mixer Tap Sealing
- General Rubber Washer Ring
- Bed Frame Noise Reduction
- Old Faucet Sealing
- Screw Cushioning
- Shower Head Sealing
- Shower Hose Sealing
- Sink Tap Sealing
- Squeaky Bed Fixing
- Toilet Cisterns
- Toilet Seat Stabilization
- Hozelock Fittings
Material PropertiesEPDM
- Outstanding UV, ozone and weather resistance — the go-to for outdoor, roofing and marine exposure.
- Excellent with water, steam, coolants and mild chemicals.
- Serviceable from roughly -60°F to 300°F.
- Not recommended for petroleum oils, fuels or solvents.
- Compressed non-rubber fiber with high compressive strength and minimal cold flow.
- Holds torque without over-squeezing — ideal under high clamp loads.
- Resists oils, fuels, coolants and solvents.
- Best where a firm, dimensionally stable washer beats a soft rubber seal.
- Highest elasticity, tear strength and abrasion resistance of the lineup.
- Excellent vibration damping and cushioning under load.
- Serviceable from roughly -60°F to 180°F.
- Degrades with oils, fuels, ozone and prolonged sunlight — best for indoor mechanical use.
- Balanced all-purpose rubber with good resistance to oils, greases, ozone and weathering.
- Serviceable from roughly -40°F to 220°F.
- Good compression set, flex fatigue and flame resistance.
- Solid choice for general indoor/outdoor sealing where moderate oil exposure is expected.
- Best-in-class resistance to petroleum oils, fuels and greases.
- Good abrasion and tear resistance; serviceable from roughly -30°F to 250°F.
- Limited UV and ozone resistance — best used indoors or shielded from direct sunlight.
- First pick for automotive, fuel-system and oily-machinery sealing.
- Widest temperature range of the lineup: roughly -70°F to 450°F.
- Excellent UV, ozone and weathering resistance; stays flexible in extreme cold.
- Inert material commonly used in food, beverage and appliance applications.
- Lower tear strength — not suited to oils, fuels or high-abrasion service.
- Premium fluoroelastomer with outstanding chemical resistance — fuels, oils, acids and many solvents.
- Continuous service temperature up to roughly 400°F.
- Excellent UV, ozone and weathering performance.
- The long-life choice for harsh chemical or high-heat environments.
Delivery and Shipping
Delivery and Shipping
Usually Ships Within 24 Hours. All Orders Are Shipped With Tracking Numbers.
Rubber Washer 4" OD x 7/16" ID x 1/4" Thick - EPDM is backordered and will ship as soon as it is back in stock.
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