Stainless Steel Bonded Sealing Washers | Dimensions | Specifications | Stainless Steel Fasteners Data | Diameters | Size | Fasteners Weight Calculator | Price in India
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PRODUCT: 3/8 ID x 7/8" OD 316 Stainless Steel Sealing Washer. 20 Gauge 316 Stainless Steel with 0.076" Bonded EPDM Rubber Seal. 4000/Box. Price/Box. (leadtime 1-3 business days)
APPLICATIONS: Marine, saltwater or anywhere corrosive or where 316 stainless is needed. Sealing and flashing; metal roofing and siding applications etc. Fits tightly to 3/8" fasteners, screws etc.
MATERIALS/CONSTRUCTION: ASTM grade 20-Gauge (~0.040") 316 Stainless Steel Black EPDM Rubber 70 durometer hardness, thickness about 0.076", meets ASTM D2000. Overall thickness about .150" before compression; Available compression about 0.030". Made in India.
BONDED SEALING WASHER MATERIALS: Standard thickness is 0.065 for Metal backed washers, and 3/32" (0.093") for plain rubber washers. EPDM (Ethylene Propylene Diene Terpolymer) is an excellent, low-cost ozone and weather resistant elastomer which possesses superior aging characteristics. It is also extremely effective when application requirements dictate heat resistance up to 275º F (intermittent), 212F continuous. Use of EPDM in direct contact with petrochemicals is not recommended. For construction applications where the primary hazards are ozone ultraviolet radiation and temperature extremes, EPDM is the consistent elastomer of choice. EPDM Rubber Datasheet NEOPRENE (Polychloroprene), one of the earliest and perhaps best known, of the man-made elastomers is still one of the most versatile facing material for sealing and cushioning washers. Recommended for alkaline and acid salt solutions and aldehydes such as formaldehyde -65°F to 250°F. It is highly resistant to sunlight ozone weathering and aging while enjoying good memory and elasticity. Although its particular strength lies in its resistance to petrochemicals and certain other chemical families Neoprene is a generalist - performing well in a myriad of applications. When direct contact with petrochemicals is of greater concern than direct U.V., Neoprene will do the job. SILICONE: High Temperature Red Silicone is available by special order (order minumums apply). Suitable for 500F (260C) intermittent and 437F (225C) continuous. Substrate Backing Metal Materials: Standard thickness is 20 gauge, others are available by special order GALVANIZED STEEL provides excellent strength characteristics and possesses greater corrosion resistance than a common commercial zinc-plated bolt or screw at the lowest possible cost.
STAINLESS STEEL (Austenitic 300 Series or 18-8/A2) combines the optimum corrosion resistance and lowest cost available in a premium material. Its use is indicated wherever stainless fasteners are required or when a corrosive environment would compromise lesser metals.
316 STAINLESS STEEL (Austenitic 300 Series with Molybdenum/A4) provides the highest corrosion resistance available in standard production materials. due to its higher cost it is specified only in the highest corrosion marine or industrial environments. BONDED SEALING WASHER FEATURES:
Where sealing properties are required, the conical design directs the flow of the elastomeric portion toward the problem areas. Where cushioning or vibration presents a problem, our full-face elastomeric material affords 100% protection.
Features Include: Quality elastomeric compounding to meet specifications for elasticity, memory, temperature extremes, chemical, ozone, and sunlight-resistance.
Conical design directs flow of facing materials to form a seal conforming to both fastener and sealing surface.
Full-face design cushions fragile surfaces and minimizes vibration.
Inside diameter sizes for #4 diameter screw to 1-1/2" diameter bolts and corresponding metric range.
Typical Dimensions: Metal Thickness is 20 Gauge / ~ 0.030 mils, and rubber thickness is 0.066" nominal. Washer assembly is coined to created a total thickness of 0.120 to 0.140, depending on washer size (before torque is applied). Inside diameter of rubber washer is designed to seal tightly to screw.
SEALING IN. . . OR SEALING OUT When installed in a sealing application, the materials in Sealing Washers compress against either a flexible or an inflexible surface to permanently seal in or seal out any operating environment, whether natural or industrial. Facing materials are engineered to provide optimal resistance to weathering from ozone, ultraviolet light and/or chemical agents.
CUSHIONING AND VIBRATION CONTROL As the washer is compressed and fastened against a substrate, the facing material serves as a permanent cushion. This feature protects the substrate from installation damage (spinning fastener and/or torque) and from vibration damage during the product's life cycle.
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