S-91273A139 10-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 3/16" shoulder diameter with tight tolerance control (-0.004" to -0.002")
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing applications
• Secure, non-slip installation facilitated by the knurled hex socket head design
• Fine thread engagement with 10-32 UNF Class 2A threads providing vibration resistance and improved clamping force
• Consistent dimensional accuracy with standard shoulder fit and Rockwell B55 hardness for repeatable assembly operations
• Global regulatory compliance meeting RoHS 3 and REACH standards for safe use in international markets

Professional Applications & Engineering Value

This 10-32 UNF fine thread shoulder screw is engineered to solve critical alignment challenges in precision assemblies. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for machinery, automation systems, and electronic enclosures exposed to moisture or chemicals. The 3/16" shoulder diameter with controlled tolerances acts as a precise pivot or bearing surface, eliminating component misalignment and reducing wear. The hex socket drive with knurled texture ensures secure tool engagement during installation, preventing cam-out in high-torque applications. Combined with Class 2A thread fit and fine threading, this shoulder screw maintains stability in vibrating environments, offering long-term reliability for industrial equipment and precision instruments.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNF standards, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for consistent dimensional accuracy. Manufactured from 18-8 stainless steel with Rockwell B55 hardness, it meets mechanical performance requirements of 70,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety for global industrial applications.