S-91221A127 3/8"-16 x 1/2" ASME B18.3, UL 94 HB Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with glass-filled nylon material, ideal for harsh environments without rust or galvanic corrosion.
• High tensile strength of 17,000 psi ensures reliable load-bearing capacity for demanding industrial applications.
• Wide temperature tolerance from -40° to 200°F maintains performance in extreme thermal conditions.
• Precise Class 2A thread fit with UNC coarse threads for easy installation and secure, vibration-resistant connections.
• Standard hex drive design (5/16") allows for efficient tool engagement and torque application in confined spaces.
• Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability for consistent engineering use.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence in global markets.

Professional Applications & Engineering Value

This glass-filled nylon socket head cap screw addresses critical challenges in industries requiring lightweight, non-conductive, and corrosion-resistant fastening solutions. The 3/8"-16 UNC coarse thread design facilitates quick assembly and disassembly, reducing labor time in equipment maintenance and electrical enclosures. Its off-white color and plastic composition make it suitable for applications where metal detection interference or aesthetic matching is a concern, such as in food processing machinery, medical devices, and outdoor electronics. With a fully threaded rod and hex drive, it provides uniform clamping force and accessibility in tight spaces, enhancing reliability in industrial plastic fastener systems that demand durability under varying thermal stresses.

Specification Summary & Compliance

The screw features a Class 2A thread fit per UNC standards, ensuring precise dimensional tolerances for consistent performance. It adheres to ASME B18.3 manufacturing specifications for socket head cap screws, providing reliability in mechanical assemblies. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free from hazardous substances and meets environmental regulations for safe use in diverse sectors.