S-90044A433 1/2"-13 x 2 3/8" ASME B18.3, ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides corrosion resistance and a durable finish, extending service life in harsh industrial environments.
• Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies in critical machinery.
• Partially threaded design allows for precise clamping force control and easier alignment in assembled components.
• Hex socket drive (3/8") enables high-torque installation with standard tools, minimizing stripping and improving installation efficiency.
• UNRC coarse threading facilitates quick assembly and disassembly, reducing labor time in maintenance and production settings.
• Rockwell C37 hardness ensures high wear resistance and durability under repetitive load conditions.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this black-oxide alloy steel socket head cap screw addresses common challenges in heavy machinery, automotive, and construction sectors. The high tensile strength (170,000 psi) and Rockwell C37 hardness provide exceptional resistance to dynamic loads and wear, preventing premature failure in vibrating environments. Its UNRC coarse thread and Class 3A fit ensure precise, secure fastening in components requiring reliable torque retention. The partially threaded shank optimizes grip length for varied material thicknesses, while the hex socket drive allows for efficient installation in confined spaces. Ideal for use in assembly lines, equipment frames, and structural supports, this screw delivers consistent performance where durability and compliance with ASME B18.3 standards are critical.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNRC coarse thread with Class 3A thread fit for high precision, and a minimum thread length of 1-1/2". Manufactured from alloy steel with a black-oxide finish, it meets ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.