S-91273A238 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 enabled by the 4" shoulder with tight ±0.005" length tolerance
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure, non-slip installation thanks to the knurled hex socket head design
• Reliable thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing
• Consistent hardness at Rockwell B55 ensures long-term wear resistance and dimensional stability

Professional Applications & Engineering Value

This stainless steel shoulder screw solves critical alignment challenges in precision machinery and industrial equipment. The 4" shoulder length with tight tolerances (±0.005") provides exact positioning for rotating components, while the 1/2"-13 UNC coarse threads and Class 2A thread fit ensure rapid assembly and maintained alignment under vibration. The 18-8 stainless steel material combined with Rockwell B55 hardness delivers exceptional corrosion resistance and durability in manufacturing environments, making it ideal for pivots, axles, and guide pins where precision and reliability are paramount.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit and shoulder diameter tolerance of -0.004" to -0.002". Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Features UNC coarse thread specifications with 1/2"-13 threading and standard shoulder fit for consistent performance across industrial applications.