S-90303A120 10-32 x 1" ASME B18.3, ASTM A574 Nylon-Tip Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in harsh environments
• Precise, reliable fastening ensured by Class 3A thread fit and UNF fine threads for vibration resistance and secure connections
• High tensile strength of 180,000 psi and Rockwell C39 hardness for demanding industrial applications
• Non-marring nylon tip protects sensitive surfaces from damage during installation and use
• Wide temperature tolerance with nylon tip rated from -50° to 250°F, suitable for varied operating conditions
• Easy installation and removal with 5/32" hex drive and standard socket head design
• Full threading provides consistent grip along the entire 1" length for uniform clamping force

Professional Applications & Engineering Value

Engineered for precision assemblies, these 10-32 UNF socket head cap screws address critical needs in machinery, electronics, and automotive sectors where vibration resistance and surface protection are paramount. The black-oxide alloy steel construction combats rust and wear, while the Class 3A thread fit minimizes backlash in dynamic loads. The integrated non-marring nylon tip prevents scratches on finished components, making them ideal for calibrating equipment or securing delicate parts without compromising integrity. Their fine thread spacing enhances load distribution, reducing the risk of loosening under stress and ensuring long-term reliability in high-strength applications.

Specification Summary & Compliance

This screw meets ASME B18.3 and ASTM A574 specifications, with Class 3A thread fit for tight tolerances and fully threaded UNF design. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Dimensions include a 1" length, 5/32" hex drive, and 5/16" head diameter, manufactured in the inch system for consistent performance.