S-91259A841 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 shear strength for reliable performance in demanding applications
• Precision thread engagement with Class 3A fit ensures secure fastening and vibration resistance in critical assemblies
• Enhanced corrosion protection through black oxide finish extends service life in industrial environments
• Superior wear resistance from Rockwell C32 hardness maintains dimensional stability under repeated use
• Secure installation and removal with 3/8" hex drive and knurled head for positive grip during torque application
• Accurate component alignment through precisely machined shoulder with tight diameter and length tolerances
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw delivers critical engineering solutions for industrial applications requiring precise component positioning and high-strength fastening. The alloy steel construction with black oxide finish provides exceptional durability against corrosion and wear in demanding environments. The socket head design with 3/8" hex drive ensures secure installation in confined spaces, while the knurled head texture prevents tool slippage during high-torque applications. The precision-machined shoulder diameter and 1 3/4" shoulder length with tight tolerances enable accurate alignment of moving parts in machinery, bearings, and pivoting mechanisms. The Class 3A thread fit and coarse UNC threads provide reliable engagement in high-vibration industrial equipment, making this shoulder screw ideal for manufacturing, automation, and heavy machinery applications where precision and reliability are paramount.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with 5/8"-11 UNC coarse threads and maintains tight shoulder diameter tolerance of -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications with material compliance to ASTM A574. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial components.