S-90117A630 3/8"-16 x 1 3/4" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial environments, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding applications.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and durability, extending service life in harsh conditions.
• Partially threaded design with 1 3/4" length allows for precise clamping control and easy alignment in machinery and equipment.
• 5/16" hex drive and standard socket head enable efficient installation with common tools, minimizing assembly time and labor costs.
• Rockwell C37 hardness ensures high wear resistance and maintains structural integrity under repeated loads.
• Coarse UNC threads facilitate quick engagement and disassembly, ideal for maintenance and repair operations.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in industrial settings, such as vibration loosening and corrosion-induced failures. The 3/8"-16 UNC coarse thread with Class 3A fit ensures precise, secure fastening in heavy machinery, automotive assemblies, and construction equipment, where alignment and stability are paramount. The partially threaded rod type allows for focused clamping force, reducing stress concentration and improving joint integrity. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands extreme operational stresses, while the black-oxide surface treatment provides a protective layer against moisture and chemicals. Ideal for high-strength fastening in manufacturing and engineering projects, this screw delivers long-term reliability and compliance with industry standards.

Specification Summary & Compliance

This socket head cap screw features a 3/8"-16 UNC coarse thread with Class 3A thread fit for high precision and dimensional accuracy. It adheres to ASME B18.3 manufacturing specifications, ensuring consistent quality and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for use in various industrial applications.