S-93691A330 10-32 MS51576-21, NASM51576 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional strength and durability provided by Rockwell B55 hardness and 70,000 psi tensile strength, ensuring reliable performance under high stress.
• Precise alignment and smooth rotation due to the exact shoulder diameter tolerance (-0.001" to 0") and smooth head texture, reducing wear in assemblies.
• Secure and efficient installation with a standard hex socket drive (1/8"), allowing for high torque application without slippage.
• Accurate thread engagement featuring a 10-32 UNF fine thread with Class 2A fit, minimizing the risk of cross-threading and ensuring tight fastening.
• Compliance with rigorous standards including MS51576-21, RoHS 3, and REACH, guaranteeing quality and environmental safety for global applications.
• Versatile right-hand thread design for easy integration into various machinery and equipment requiring dependable shoulder screw solutions.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial settings. Made from 18-8 stainless steel with a passivated finish, it resists corrosion and extends service life in moist or chemical-exposed environments. The 10-32 UNF fine thread and precise shoulder fit (with diameter tolerance of -0.001" to 0") ensure minimal play and accurate positioning in assemblies like pivots, gears, and rotating shafts. Its socket head with hex drive facilitates easy installation in tight spaces, while the high tensile strength and hardness support heavy-duty applications in aerospace, automotive, and machinery manufacturing, reducing maintenance needs and downtime.

Specification Summary & Compliance

The screw features a Class 2A thread fit for consistent engagement and a shoulder length of 5/8" with tight tolerances (0" to 0.002"). It conforms to MS51576-21 (NASM51576) specifications, ensuring dimensional accuracy and performance reliability. Additionally, it is RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting environmental and safety standards for use in regulated industries.