S-90295A256 0.406" ID x 1.25" OD ASME B18.22.1 Plastic Washers

Key Features & Benefits at a Glance

• Excellent corrosion resistance due to nylon plastic construction, eliminating rust and degradation in harsh environments
• Superior electrical insulation properties for safe use in electrical assemblies and sensitive equipment
• Wide operating temperature range from -40°F to 300°F, ensuring reliable performance in extreme thermal conditions
• High durability and wear resistance with Rockwell R115 hardness, providing long service life under mechanical stress
• Precise dimensional fit with 0.406" ID and 1.25" OD designed for 3/8" screws, preventing loosening and ensuring secure fastening
• Full regulatory compliance with ASME B18.22.1, RoHS 3, and REACH, guaranteeing safety and quality for industrial use
• Lightweight and non-marring material protects sensitive surfaces from damage during assembly

Professional Applications & Engineering Value

This nylon plastic flat washer is engineered to solve critical challenges in industrial and engineering applications where metal washers fail. Its non-conductive properties make it ideal for electrical enclosures, control panels, and electronic devices, preventing short circuits. The inherent corrosion resistance of nylon eliminates concerns in humid, chemical, or outdoor environments, reducing maintenance costs. With a temperature tolerance from -40°F to 300°F, it performs reliably in automotive, HVAC, and machinery exposed to thermal cycling. The green color aids in part identification, while the ASME B18.22.1 compliance ensures dimensional precision for 3/8" screw assemblies, enhancing load distribution and joint integrity without galvanic corrosion risks.

Specification Summary & Compliance

This washer meets ASME B18.22.1 dimensional standards with an ID of 0.406", OD of 1.25", and thickness range of 0.090-0.112" for consistent fit. It is manufactured from nylon plastic with a hardness of Rockwell R115 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The product is suitable for use in inch system applications and operates within a temperature range of -40°F to 300°F.