S-91223A344 3/8"-16 x 1 1/4" 316 Stainless Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Enhanced torque transmission from the ultra-low socket head profile and 3/16" hex drive, reducing tool slippage and head stripping
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-lasting fastening under heavy loads
• Precise thread engagement with Class 2A fit UNC coarse threads, ensuring consistent assembly and vibration resistance
• Full-threaded design for maximum grip along the entire 1 1/4" length, providing uniform clamping force
• Strict dimensional control with head diameter tolerance of ±0.005", enabling precise fit in machined components
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This 316 stainless steel socket head cap screw delivers exceptional performance in demanding applications where corrosion resistance and mechanical reliability are critical. The ultra-low head profile and hex drive design maximize torque efficiency, preventing common issues like cam-out and head rounding during high-torque assembly. Its UNC coarse threads with Class 2A fit provide rapid installation and secure fastening in machinery, automotive systems, and marine equipment. The fully threaded construction ensures consistent clamping force across the entire length, reducing the risk of joint loosening under dynamic loads. Engineered for industrial fasteners requiring durability, these screws are ideal for use in chemical processing, food equipment, and outdoor installations where moisture and corrosive agents are present.

Specification Summary & Compliance

This socket head cap screw features a 3/8"-16 UNC coarse thread with Class 2A thread fit per standard inch specifications, ensuring precise dimensional accuracy and interchangeability. The head diameter tolerance is maintained within -0.005" to 0.005" for consistent assembly. Manufacturing complies with industry standards for material and mechanical properties, including a tensile strength of 70,000 psi and Rockwell B70 hardness. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substance restrictions.