S-91273A553 10-32 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion Resistance: 18-8 stainless steel construction with black oxide finish provides excellent protection against rust and wear in harsh industrial environments.
• High Load Capacity: Tensile strength of 70,000 psi and shear strength of 35,000 psi ensure reliable performance under heavy mechanical stress.
• Precision Alignment: Class 2A thread fit and fine UNF threads offer superior accuracy and secure fastening in precision assemblies.
• Enhanced Grip & Durability: Knurled head and Rockwell B55 hardness prevent slipping and maintain integrity during repeated installation and removal.
• Easy Installation: Standard socket head with 3/32" hex drive allows for quick, tool-friendly assembly in confined spaces.
• Consistent Shoulder Dimensions: Tight tolerances on shoulder diameter and length (±0.005") ensure exact fit and smooth rotation in pivot and bearing applications.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, making it safe for use in regulated industries and global markets.

Professional Applications & Engineering Value

This 10-32 UNF shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 stainless steel material, combined with a black oxide finish, resists corrosion and extends service life in humid or chemically exposed settings. Its 5/8" shoulder length and precise Class 2A thread fit provide stable pivoting and spacing in assemblies like rotating shafts, linkages, and bearing mounts, reducing wear and minimizing maintenance. The socket head design with knurled texture ensures secure tool engagement, preventing cam-out during high-torque applications. Ideal for automation equipment, automotive systems, and precision instruments, this screw delivers consistent performance where fine thread accuracy and high tensile strength are paramount.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with Class 2A fit for precise engagement, and shoulder dimensions held to tight tolerances (e.g., diameter: -0.004" to -0.002"; length: -0.005" to 0.005"). Manufactured from 18-8 stainless steel with black oxide finish, it meets industry standards for mechanical properties, including Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.