S-91435A160 0.125" ID x 0.312" OD Plastic Washers

Key Features & Benefits at a Glance

• Extreme temperature resilience for reliable performance from -420°F to 450°F, preventing failure in harsh thermal cycling environments
• Superior chemical resistance thanks to polyimide plastic construction, ensuring longevity when exposed to aggressive industrial substances
• Precision dimensional accuracy with 0.125" ID and 0.312" OD for perfect fit with No. 4 screws, reducing assembly errors and improving joint integrity
• Ultra-thin profile (0.005-0.006" thickness) for space-constrained applications without compromising on insulation or load distribution
• Full regulatory compliance with RoHS 3 and REACH standards, guaranteeing safe use in global markets and sensitive industries
• High-visibility orange color for easy identification and inventory management during maintenance and installation processes
• Excellent dielectric properties providing reliable electrical insulation in electronic and electrical assembly applications

Professional Applications & Engineering Value

This polyimide plastic flat washer delivers exceptional engineering value in demanding applications where conventional washers fail. The high-temperature polyimide material maintains structural integrity and dimensional stability across extreme thermal ranges from cryogenic -420°F to high-heat 450°F environments, solving critical thermal expansion mismatch issues in aerospace, automotive, and electronics assemblies. The chemical-resistant properties prevent degradation from oils, solvents, and fuels, while the precise 0.125" ID and 0.312" OD dimensions ensure perfect alignment with No. 4 screws, distributing clamp load evenly and preventing surface damage to sensitive components. These flat washers are indispensable in electrical insulation applications, providing reliable dielectric barriers in motor assemblies, circuit boards, and high-voltage equipment where both thermal performance and electrical isolation are paramount.

Specification Summary & Compliance

This flat washer features precision inch system dimensions with 0.125" inner diameter, 0.312" outer diameter, and 0.005-0.006" thickness, engineered specifically for No. 4 screw size applications. The product is manufactured from polyimide plastic in distinctive orange color and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use across global markets.