S-93783A031 0.364" ID x 0.666" OD High-Pressure Bonded Sealing Washers For Screw Heads

High-Pressure Bonded Sealing Washers For Screw Heads

1338FA00028 High-Pressure Bonded Sealing Washers For Screw Heads
1338FA00028 High-Pressure Bonded Sealing Washers For Screw Heads

Image may differ from product. See technical specification for details.

Part No.
Part No. 1338FA00028
Equivalent to mcmaster :
93783A031

Basic Information

System of Measurement Inch
Washer Type Metal Bonded

Dimension Parameters

ID 0.364"
OD 0.666"
Thickness 0.045-0.055"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Rockwell B71

Temperature & Environment Parameters

Temperature Range, °F Min. -40°
Temperature Range, °F Maximum 225°

Installation & Application Parameters

For Screw Size 3/8"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant

Seal Parameters

Seal Material Buna-N Rubber
Seal Hardness Durometer 55A
Seal Color Black
Maximum Pressure, psi For Fluids 3400
Maximum Pressure, psi For Gases 200
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior sealing performance with bonded Buna-N rubber that prevents fluid and gas leaks under demanding conditions
  • Exceptional temperature resilience maintaining seal integrity across a broad range from -40°F to 225°F
  • High-pressure resistance capable of withstanding up to 3400 psi for fluids and 200 psi for gases
  • Durable zinc-plated steel construction providing corrosion resistance and Rockwell B71 hardness for long service life
  • Precision dimensional compatibility with 0.364" ID and 0.666" OD designed specifically for 3/8" screw applications
  • Reliable industrial compliance meeting both RoHS 3 and REACH standards for safe, regulated usage
  • Optimized seal hardness with Durometer 55A Buna-N rubber ensuring perfect compression and vibration resistance

Professional Applications & Engineering Value

This metal bonded washer combines zinc-plated steel structural integrity with a Buna-N rubber seal to solve critical sealing challenges in industrial environments. The inch system dimensions (0.364" ID x 0.666" OD) ensure perfect fitment for 3/8" screw size applications while the temperature resistance from -40°F to 225°F maintains performance in extreme conditions. Engineers benefit from the dual-material construction that prevents leakage in high-pressure fluid systems (3400 psi) and gas applications (200 psi), making these industrial washers ideal for hydraulic systems, pneumatic equipment, and machinery requiring reliable sealing solutions. The black Buna-N seal provides visible quality assurance and consistent compression across mating surfaces.

Specification Summary & Compliance

This metal bonded washer features precise inch system dimensions with 0.364" inner diameter and 0.666" outer diameter, specifically engineered for 3/8" screw size applications. The construction combines zinc-plated steel with Rockwell B71 hardness and a Buna-N rubber seal rated at Durometer 55A. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial use across global markets.

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