S-91273A317 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
• Precise component alignment ensured by the 1-1/2" shoulder with tight ±0.005" length tolerance
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure installation and removal using the 1/4" hex drive and knurled head for enhanced grip
• Reliable thread engagement with Class 2A UNC coarse threads for consistent fastening performance
• Durable long-term performance backed by Rockwell B55 hardness for wear resistance
• Global compliance assurance meeting RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to solve critical alignment and durability challenges in industrial machinery. The precision-machined 1-1/2" shoulder length with tight tolerances provides exact positioning for rotating components, bearings, and linkages, eliminating misalignment issues that cause premature wear. The 1/2"-13 UNC coarse thread with Class 2A fit ensures rapid assembly and vibration resistance in high-cycle applications. With 70,000 psi tensile strength and corrosion-resistant properties, it maintains structural integrity in manufacturing equipment, automotive assemblies, and material handling systems where socket head shoulder screws must withstand continuous mechanical stress and environmental exposure.

Specification Summary & Compliance

This shoulder screw maintains Class 2A thread fit per UNC standards with precise shoulder diameter tolerance (-0.004" to -0.002") and length tolerance (±0.005"). Manufactured from 18-8 stainless steel with Rockwell B55 hardness, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability for industrial procurement requirements.