S-91259A729 3/8"-16 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
• Superior wear resistance and durability thanks to Alloy Steel construction and Rockwell C32 hardness rating
• Enhanced corrosion protection through Black Oxide finish, extending service life in industrial environments
• Precise component alignment with Class 3A thread fit and controlled shoulder diameter tolerance (-0.004" to -0.002")
• Secure installation and removal with hex drive socket and knurled head for superior torque transmission
• Broad compatibility with UNC coarse threads and standard shoulder fit for versatile industrial use
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards (RoHS 3 & REACH)

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw delivers critical engineering solutions for precision assemblies where alignment and strength are paramount. The alloy steel construction combined with Black Oxide finish provides exceptional durability against wear and corrosion in industrial machinery applications. The precisely machined 1/2" shoulder diameter with tight tolerances ensures perfect component positioning in rotating assemblies, jigs, and fixtures. The socket head design with hex drive allows for high-torque installation in confined spaces, while the knurled head texture prevents slipping during manual adjustments. These shoulder screws are engineered to maintain structural integrity under high stress conditions, making them ideal for precision manufacturing equipment, automotive assemblies, and heavy-duty industrial applications where reliability cannot be compromised.

Specification Summary & Compliance

This shoulder screw maintains Class 3A thread fit with UNC coarse threading (3/8"-16) for superior engagement. Shoulder diameter tolerance is controlled at -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" ensuring precise dimensional accuracy. Manufactured to ASME B18.3 specifications using ASTM A574 material standards. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications.