S-91221A173 2-56 x 3/8" UL 94 HB Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Enhanced durability and strength with glass-filled nylon construction, providing reliable performance in demanding industrial environments
• Wide temperature resistance from -20° to 230°F, ensuring stability in varied operating conditions without degradation
• Precise Class 2A thread fit for smooth assembly and secure fastening with reduced risk of cross-threading
• Standard hex drive compatibility with 5/64" size, allowing for easy installation using common tools
• Full thread coverage along the 3/8" length, maximizing grip and load distribution in applications
• Compliance with UL 94 HB, RoHS 3, and REACH standards, ensuring safety and environmental responsibility
• Corrosion-resistant black plastic material, ideal for electrical and non-magnetic applications

Professional Applications & Engineering Value

This glass-filled nylon socket head cap screw with 2-56 UNC coarse threads and Class 2A thread fit is engineered to address common industrial challenges such as corrosion, electrical insulation, and weight reduction. The black plastic composition and temperature resistance from -20° to 230°F make it suitable for electronics, automotive, and machinery where metal fasteners may cause galvanic corrosion or interfere with sensitive components. Its fully threaded design and 5/64" hex drive ensure quick, secure installations in tight spaces, reducing assembly time and improving reliability in industrial plastic fastener applications.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with Class 2A thread fit for precise dimensional accuracy. It meets UL 94 HB for flammability safety, RoHS 3 (2015/863/EU) for hazardous substance restriction, and REACH (EC 1907/2006) compliance, ensuring it aligns with global environmental and safety regulations for industrial use.