S-98885A133 5/16"-18 x 3/4" ASME B18.3, UL 94 V-0 Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional thermal stability for reliable performance across extreme environments from -50°F to 500°F
• High tensile strength of 25,000 psi ensures secure fastening in demanding mechanical assemblies
• Superior chemical and corrosion resistance from PEEK plastic material for extended service life
• Excellent electrical insulation properties prevent current leakage in sensitive electronic applications
• Precision Class 2A thread fit guarantees consistent engagement and vibration resistance
• UL 94 V-0 flammability rating provides critical fire safety compliance for regulated industries
• Hex socket drive design enables high-torque installation in confined spaces

Professional Applications & Engineering Value

Engineered for challenging environments where metal fasteners fail, this PEEK plastic socket head cap screw solves critical engineering problems in aerospace, semiconductor, and chemical processing applications. The 5/16"-18 UNC coarse thread configuration with Class 2A fit maintains clamping force under thermal cycling and vibration. As a fully threaded fastener, it provides uniform stress distribution while the beige PEEK material offers inherent resistance to steam, chemicals, and radiation degradation. These high-temperature plastic fasteners eliminate galvanic corrosion concerns in multi-material assemblies while providing essential electrical insulation in power distribution and electronic enclosures.

Specification Summary & Compliance

This socket head cap screw features precise Class 2A thread fit with UNC coarse thread spacing and complies with ASME B18.3 dimensional specifications. The fastener meets UL 94 V-0 flammability standards and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no SVHC substances above threshold limits as of January 2022.