S-91273A119 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under significant mechanical loads.
• Precision shoulder alignment with tight diameter and length tolerances for accurate component positioning and reduced assembly vibration.
• Secure hex socket drive with knurled head texture provides superior torque transmission and slip-resistant handling during installation.
• Coarse UNC threads with Class 2A fit enable quick assembly and disassembly while maintaining secure fastening in various materials.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and unrestricted use in regulated industries.
• Rockwell B55 hardness offers excellent wear resistance and durability for high-cycle applications.

Professional Applications & Engineering Value

This 5-40 UNC shoulder screw in 18-8 stainless steel is engineered to address critical alignment and durability challenges in precision assemblies. The 1/8" shoulder diameter and 1" shoulder length with controlled tolerances provide a stable pivot or spacer, minimizing part movement and wear in rotating machinery, linkages, and electronic enclosures. The hex socket head with knurled texture ensures efficient installation in confined spaces, while the coarse thread spacing and Class 2A thread fit reduce cross-threading risks. Ideal for applications demanding high shear strength and corrosion resistance, such as automotive controls, conveyor systems, and medical devices, this screw enhances assembly reliability and reduces maintenance frequency.

Specification Summary & Compliance

This shoulder screw features a 5-40 UNC coarse thread with Class 2A fit per standard inch specifications. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005" for precise engineering applications. Manufactured from 18-8 stainless steel with a hardness of Rockwell B55, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial use.