S-91273A555 10-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, long-lasting assemblies.
• Precise alignment and spacing ensured by the 1" shoulder with tight diameter and length tolerances for consistent performance.
• Secure, non-slip installation facilitated by the knurled socket head and 3/32" hex drive, reducing tool slippage.
• Fine UNF thread (10-32) with Class 2A fit provides vibration resistance and ensures a secure, precise connection in right-hand applications.
• Rockwell B55 hardness enhances durability and wear resistance, extending the screw's service life.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and suitability for global markets.

Professional Applications & Engineering Value

This 10-32 UNF shoulder screw is engineered to address critical alignment and rotational stability challenges in industrial applications. The 1" precision shoulder acts as a pivot, bearing surface, or locator, minimizing component misalignment and wear in assemblies like machinery, automotive systems, and precision instruments. Manufactured from 18-8 stainless steel with a black oxide finish, it resists corrosion and oxidation, ensuring reliability in demanding conditions. The socket head with knurling and hex drive allows for high-torque installation without cam-out, while the fine UNF threads and Class 2A fit maintain tight tolerances, reducing the risk of loosening under vibration. This combination of high tensile strength and precise dimensions makes it an essential shoulder fastener for OEMs and maintenance teams seeking durability and performance.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF thread with Class 2A fit for precise engagement, and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005" ensuring consistent assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming its suitability for environmentally regulated industrial use.