S-91273A658 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from the black oxide finish, reducing maintenance needs.
• High tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance under heavy loads.
• Precise Class 2A thread fit ensures smooth assembly and secure fastening in machinery applications.
• Knurled socket head with hex drive provides superior grip and torque application, minimizing slippage.
• Rockwell B55 hardness offers excellent mechanical strength and resistance to deformation.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and broad industry acceptance.

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw is engineered to address common industrial challenges, such as misalignment and component wear in rotating assemblies. Made from 18-8 stainless steel with a black oxide finish, it resists rust and corrosion, extending service life in demanding settings like machinery, automotive, and manufacturing equipment. The right-hand coarse thread and Class 2A fit enable quick, secure installations, while the knurled socket head allows for high-torque applications without tool slippage. Its robust shoulder diameter provides precise alignment and bearing surfaces, reducing vibration and improving overall system reliability for industrial fasteners.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 2A fit for standard tolerance, ensuring dimensional accuracy. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and shoulder length is 5/16" with a tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety standards for industrial use.