S-90665A188 3/8"-16 x 1 1/2" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance in demanding applications
• Superior corrosion resistance with zinc-plated alloy steel construction for extended service life
• Precise Class 3A thread fit provides superior engagement and vibration resistance
• Low profile socket head design offers space-saving installation in confined areas
• Hex drive compatibility allows for secure tool engagement and consistent torque application
• Full threading along entire length enables maximum adjustability and holding power
• Rockwell C39 hardness rating maintains structural integrity under heavy loads

Professional Applications & Engineering Value

This low profile socket head cap screw delivers critical engineering advantages where space constraints and reliability are paramount. The zinc-plated alloy steel construction provides excellent corrosion protection in industrial environments, while the 3/8"-16 UNC coarse thread ensures quick installation and superior resistance to vibration loosening. The Class 3A thread fit guarantees precise mating with corresponding components, making these socket head cap screws ideal for machinery assembly, automotive applications, and heavy equipment where 140,000 psi tensile strength is essential for maintaining structural integrity under dynamic loads. The combination of right-hand threading and hex drive compatibility streamlines maintenance and assembly processes in manufacturing and repair operations.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications with Class 3A thread fit and UNC coarse threading standards. Features include 3/8"-16 thread size, 1-1/2" length, and full threading configuration. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications while meeting international quality and safety standards.