S-91221A126 5/16"-18 x 1" ASME B18.3, UL 94 HB Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional chemical resistance from glass-filled nylon construction, ideal for harsh industrial environments
• Reliable thermal stability with a wide operating range of -40°F to 200°F for consistent performance
• High tensile strength of 17,000 psi provides secure fastening in demanding applications
• Precise Class 2A thread fit ensures smooth installation and vibration resistance
• Standard 1/4" hex drive allows for easy installation with common tools
• Full compliance with ASME B18.3 guarantees dimensional accuracy and interchangeability
• RoHS 3 and REACH compliant for environmentally responsible manufacturing

Professional Applications & Engineering Value

These glass-filled nylon socket head cap screws deliver critical advantages in applications where metal fasteners fail. The off-white plastic construction provides excellent resistance to chemicals, corrosion, and electrical insulation, making them perfect for electrical enclosures, food processing equipment, and marine environments. With their 5/16"-18 UNC coarse thread and Class 2A thread fit, they offer superior engagement and vibration resistance while maintaining dimensional precision per ASME B18.3 standards. The 1/4" hex drive ensures secure tool engagement without stripping, while the material's thermal stability maintains integrity across extreme temperature fluctuations from -40°F to 200°F.

Specification Summary & Compliance

This socket head cap screw features precise Class 2A thread fit with 5/16"-18 UNC coarse threads and right-hand thread direction. Manufactured to ASME B18.3 specifications with full compliance to UL 94 HB flammability rating, RoHS 3 (2015/863/EU) for hazardous substance restriction, and REACH (EC 1907/2006) regulations for chemical safety.