S-99477A128 3/8"-16 x 1" ASME B18.3, UL 94 HB Plastic Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with durable Polypropylene Plastic construction, ideal for harsh environments without risk of rust or chemical degradation.
• High tensile strength of 4500 psi ensures reliable fastening under mechanical stress, reducing failure risks in demanding applications.
• Wide operating temperature range (-20° to 180°F) maintains performance in varied thermal conditions, from cold storage to heated assemblies.
• Precise Class 2A coarse UNC threads provide easy installation and secure fit, minimizing cross-threading and improving assembly efficiency.
• 5/16" hex drive socket head allows for high-torque application with standard tools, enhancing grip and reducing slippage during tightening.
• Compliance with ASME B18.3, RoHS 3, and REACH standards guarantees quality, safety, and environmental responsibility for regulated industries.
• Fully threaded design offers consistent engagement along the entire 1" length, enabling adjustable positioning and uniform load distribution.

Professional Applications & Engineering Value

This 3/8"-16 UNC Socket Head Cap Screw made from Polypropylene Plastic addresses critical industrial challenges, such as corrosion in chemical processing or electrical insulation needs. Its coarse thread and Class 2A fit ensure quick, reliable assembly in automated systems, reducing downtime. The hex drive and socket head design provide excellent access in confined spaces, while the temperature resistance from -20° to 180°F makes it suitable for outdoor equipment or HVAC components. Ideal for industrial plastic fasteners in machinery, packaging, and consumer goods, it combines lightweight durability with high tensile strength for long-term performance without metal-related issues like galvanic corrosion.

Specification Summary & Compliance

This fastener features a 3/8"-16 UNC coarse thread with Class 2A dimensional accuracy for consistent fit and ease of use. It adheres to ASME B18.3 manufacturing specifications, ensuring reliability in mechanical assemblies. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for hazardous substance restrictions, supporting sustainable and safe industrial applications.