S-91273A671 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance thanks to the black oxide finish and Rockwell B55 hardness
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and secure fit ensured by the Class 2A thread fit and standard shoulder fit
• Easy installation and removal with the knurled socket head and 1/4" hex drive, reducing assembly time
• Reliable performance in coarse threading using the 1/2"-13 UNC thread for robust connections
• Compliance with environmental standards, including RoHS 3 and REACH, ensuring safe and sustainable use

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw is engineered to address common industrial challenges, such as component misalignment and vibration-induced loosening. Made from 18-8 stainless steel with a black oxide finish, it offers excellent corrosion resistance and reduced friction, extending service life in machinery, automotive assemblies, and heavy equipment. The socket head with knurled texture and hex drive allows for quick, secure fastening in tight spaces, while the coarse UNC threads and precise Class 2A thread fit ensure stable performance under high stress. Ideal for pivots, axles, and rotating parts, this shoulder screw minimizes downtime and maintenance costs in industrial applications.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit with UNC threading for consistent dimensional accuracy, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It adheres to standard manufacturing specifications for shoulder screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and reliability in industrial use.