S-91259A853 5/8"-11 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi minimum shear strength for reliable performance in high-stress applications
• Superior corrosion resistance through black oxide finish, extending service life in demanding industrial environments
• Precision alignment and smooth rotation with Class 3A thread fit and standard shoulder fit for consistent assembly performance
• Enhanced durability and wear resistance from Rockwell C32 hardness alloy steel construction
• Secure installation and removal with knurled head texture and 3/8" hex drive socket for superior grip and torque transmission
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed dimensional accuracy and performance
• Environmental and safety compliance with RoHS 3 and REACH regulations for responsible industrial use

Professional Applications & Engineering Value

This high-strength alloy steel shoulder screw addresses critical engineering challenges in heavy-duty industrial applications where precision alignment and exceptional durability are paramount. The 5/8"-11 UNC coarse thread configuration ensures rapid assembly and disassembly while maintaining secure fastening in vibrating environments. The 3/4" precision shoulder diameter with tight tolerances provides accurate component positioning in machinery, automotive, and manufacturing equipment. The black oxide finish offers superior corrosion protection in harsh operating conditions, while the knurled socket head design prevents tool slippage during high-torque installations. Engineered to withstand extreme mechanical stresses, this ASME B18.3 compliant shoulder screw delivers reliable performance in precision rotating assemblies, pivot points, and structural applications where failure is not an option.

Specification Summary & Compliance

This shoulder screw maintains Class 3A thread fit for superior precision and meets ASME B18.3 dimensional standards. The shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" ensure consistent manufacturing quality. Manufactured in compliance with ASTM A574 specifications, the screw features UNC coarse threads with right-hand direction and standard shoulder fit. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental and safety regulations for industrial components.