S-91273A641 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Superior strength and durability with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under heavy loads
• Precise alignment and reduced wear due to the 3 1/2" shoulder length, providing stable bearing surfaces in assemblies
• Secure and easy installation with a knurled socket head and hex drive, preventing tool slippage during tightening
• Wide compatibility and easy assembly with 3/8"-16 UNC coarse threads and Class 2A thread fit for quick fastening
• Long-term operational reliability from Rockwell B55 hardness, resisting deformation and maintaining integrity
• Compliance with global standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address common industrial challenges such as misalignment, vibration loosening, and corrosion in demanding applications. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent resistance to rust and wear, making it suitable for machinery, automotive, and electronics assembly. The 3 1/2" shoulder length acts as a precise pivot or spacer, reducing stress on threads and improving component longevity. With a socket head and hex drive design, it ensures efficient installation in confined spaces, while the coarse threads and Class 2A fit facilitate quick, secure fastening. Ideal for use in rotating parts, jigs, and fixtures, this screw delivers consistent performance in high-stress environments, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw features precise dimensions, including a shoulder diameter of 3/8" with a tolerance of -0.004" to -0.002" and a shoulder length of 3 1/2" with a tolerance of -0.005" to 0.005". It adheres to UNC thread standards with a Class 2A thread fit for consistent accuracy. Manufactured to high-quality specifications, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory conformity for industrial applications.