S-90337A158 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing in demanding applications.
• Precise alignment and smooth rotation due to the accurate 3/32" shoulder diameter with tight tolerance, minimizing wear and vibration.
• Easy installation in confined spaces with the low-profile socket head and 5/64" hex drive, allowing efficient assembly with standard tools.
• Consistent thread engagement from Class 2A UNC coarse threads, ensuring secure fastening and reducing the risk of cross-threading.
• Durable and compliant construction meeting RoHS 3 and REACH standards, providing safe and environmentally responsible use in various industries.
• Optimized for repetitive use with a smooth head texture and precise shoulder fit, enhancing longevity in mechanical assemblies.

Professional Applications & Engineering Value

This 2-56 UNC shoulder screw is engineered to address common industrial challenges such as misalignment and corrosion in precision equipment. Made from 18-8 Stainless Steel with a passivated finish, it resists rust and chemical exposure, making it ideal for applications in machinery, electronics, and automotive systems where durability is critical. The low-profile socket head and coarse thread spacing facilitate quick installation in tight spaces, while the precisely machined shoulder ensures stable component positioning, reducing wear and maintenance costs. Its right-hand thread and robust design support high-stress environments, providing reliable performance in assemblies requiring repeated adjustments or exposure to vibrations.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent accuracy. Dimensions include a shoulder diameter of 3/32" (tolerance: -0.001" to 0") and shoulder length of 3/8" (tolerance: 0" to 0.002"), ensuring precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances.