S-90295A255 0.348" ID x 2" OD ASME B18.22.1 Plastic Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from nylon plastic construction, eliminating rust issues in humid or chemical environments
• Excellent electrical insulation properties for safe use in electrical assemblies and preventing galvanic corrosion
• Wide temperature tolerance from -40°F to 300°F, maintaining performance in extreme thermal conditions
• Consistent dimensional stability with precise 2" OD and 0.348" ID, ensuring proper fit with 5/16" screws
• Enhanced surface protection with Rockwell R115 hardness, preventing damage to connected surfaces
• Reliable compliance with ASME B18.22.1 standards, guaranteeing interchangeability and quality
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global regulatory acceptance

Professional Applications & Engineering Value

This nylon plastic flat washer delivers critical engineering advantages where metal fasteners fall short. The non-conductive properties make it ideal for electrical enclosures, control panels, and telecommunications equipment where electrical isolation is paramount. In food processing and marine applications, the corrosion-resistant nylon material withstands moisture, chemicals, and cleaning agents without degradation. The broad temperature range from -40°F to 300°F ensures reliable performance in outdoor, automotive, and HVAC systems exposed to seasonal extremes. With ASME B18.22.1 compliance, engineers can specify these washers with confidence in dimensional accuracy and load distribution for 5/16" fasteners across industrial machinery, plumbing systems, and structural assemblies.

Specification Summary & Compliance

This flat washer features precise inch system dimensions with 2" outer diameter, 0.348" inner diameter for 5/16" screws, and thickness ranging 0.047-0.080". Manufactured to ASME B18.22.1 specifications for dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. Material hardness is certified to Rockwell R115 standards, ensuring consistent mechanical properties across production batches.