S-90357A149 3/8"-16 x 3/8" Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Maximum strength performance with 140,000 psi tensile strength for reliable load-bearing in critical assemblies
• Superior thread precision through Class 3A thread fit ensures secure fastening and vibration resistance
• Enhanced durability from Rockwell C32 hardness maintains structural integrity under repeated stress
• Space-saving installation with ultra-low socket head profile ideal for confined mechanical spaces
• Optimized corrosion resistance through black-oxide coating extends service life in harsh environments
• Quick assembly efficiency with UNC coarse threads and 3/16" hex drive for rapid installation
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws deliver exceptional engineering value in demanding applications where space constraints and vibration resistance are critical concerns. The ultra-low profile head design enables installation in compact machinery, automotive assemblies, and precision equipment where standard fasteners cannot fit. The Class 3A thread fit with UNC coarse threading provides superior engagement and resistance to loosening under dynamic loads, while the 140,000 psi tensile strength ensures structural integrity in high-stress environments. The combination of Rockwell C32 hardness and black-oxide surface treatment offers excellent wear resistance and protection against corrosion, making these fully threaded screws ideal for manufacturing equipment, industrial automation, and heavy machinery applications requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to precise dimensional standards with length tolerance of -0.005" to 0.005", these socket head cap screws feature 3/8"-16 UNC coarse threads with Class 3A thread fit for superior precision. The fasteners maintain compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety standards are met for industrial use worldwide. The inch system measurement and right-hand thread direction provide compatibility with standard North American equipment and tooling requirements.