S-97768A239 10-32 ASME B18.3 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-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing applications.
• Precise alignment and smooth rotation ensured by the 1/4" shoulder with tight diameter and length tolerances for reduced wear.
• Secure, fine-thread engagement with 10-32 UNF Class 3A thread fit, minimizing loosening under vibration.
• Easy installation and removal using the hex socket drive and knurled head for improved grip and torque application.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
• Durable and long-lasting with Rockwell B55 hardness, maintaining integrity in demanding mechanical assemblies.

Professional Applications & Engineering Value

This 10-32 UNF thread shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 1/4" shoulder length provides a stable bearing surface, reducing friction and preventing component misalignment in rotating assemblies like motors, gears, and pivots. Made from 18-8 stainless steel with a black oxide finish, it resists corrosion and oxidation, extending service life in humid or chemically exposed settings. The fine UNF thread and Class 3A fit ensure tight, secure fastening, essential for high-vibration applications in automotive, aerospace, and industrial equipment. Its socket head design with knurling allows for efficient installation in confined spaces, boosting assembly speed and reliability while meeting stringent ASME B18.3 specifications.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with Class 3A thread fit for high precision. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 1/4" with a tolerance of -0.005" to 0.005", ensuring exact alignment. It complies with ASME B18.3 manufacturing standards and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations.