S-91273A669 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and black oxide finish, ideal for harsh industrial environments.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads.
• Precise alignment and reduced wear thanks to the 2" shoulder with tight tolerances for accurate component positioning.
• Easy installation and removal with a knurled socket head and 1/4" hex drive, providing secure grip and torque application.
• Durable thread engagement with Class 2A UNC coarse threads, offering consistent fit and vibration resistance.
• Rockwell B55 hardness maintains structural integrity and resists deformation in demanding applications.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw with a black oxide finish is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical stress. The 2" precision shoulder provides a stable bearing surface for rotating parts like gears and pulleys, reducing wear and extending equipment life. Its coarse UNC threads and Class 2A fit ensure quick assembly and reliable holding power in machinery, automotive, and assembly jigs. The combination of high tensile strength and corrosion resistance makes it ideal for applications requiring durability and minimal maintenance, from conveyor systems to precision instruments.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 2A fit for standard tolerance, a shoulder diameter of 1/2" with tolerance from -0.004" to -0.002", and shoulder length of 2" with tolerance from -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.