S-94361A387 5/8"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress industrial applications
• Precise thread engagement with Class 3A fit ensuring superior vibration resistance and secure fastening in critical assemblies
• Enhanced corrosion protection through black oxide finish that extends service life in demanding environments
• Superior torque transmission with 3/8" hex drive socket head and knurled texture for slip-resistant installation
• Accurate component alignment thanks to the precisely machined shoulder with tight diameter tolerance of -0.004" to -0.002"
• Optimized for fine-thread applications with 5/8"-18 UNF threads providing superior holding power in thinner materials
• Compliance-ready construction meeting RoHS 3 and REACH regulations for global industrial applications

Professional Applications & Engineering Value

This alloy steel shoulder screw delivers critical engineering solutions where precise component alignment and high-strength fastening are paramount. The Class 3A thread fit ensures minimal backlash in precision machinery, while the black oxide finish provides essential corrosion resistance without dimensional interference. The knurled socket head with 3/8" hex drive enables secure torque application in confined spaces, making it ideal for industrial automation equipment, precision manufacturing fixtures, and rotating assembly applications. The combination of 140,000 psi tensile strength and Rockwell C32 hardness ensures reliable performance in dynamic loading conditions, while the precisely controlled shoulder dimensions maintain accurate component positioning in assemblies requiring strict concentricity.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit per UNF specifications, ensuring precision engagement in critical applications. The shoulder features tight dimensional control with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". This shoulder screw complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) compliance requirements as of January 17, 2023, making it suitable for regulated industrial markets worldwide.