S-91259A732 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 high-stress applications
• Precision shoulder alignment with Class 3A thread fit ensuring accurate component positioning and reduced assembly vibration
• Superior corrosion resistance through black oxide finish protecting against industrial environmental degradation
• Enhanced installation control with knurled socket head providing secure grip during torque application
• Long-term durability from alloy steel construction with Rockwell C32 hardness maintaining structural integrity
• Industry-standard compatibility with UNC coarse threads and 1/4" hex drive for seamless integration into existing systems
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The 5" shoulder length with tight diameter tolerance provides exact axial positioning for rotating components, eliminating misalignment in conveyor systems, automation equipment, and precision assemblies. The alloy steel construction with black oxide finish resists corrosion in demanding environments while maintaining Rockwell C32 hardness under continuous operational stress. The knurled socket head with hex drive ensures secure installation in confined spaces, making it ideal for maintenance-intensive applications where repeated disassembly is required. These shoulder screws solve common engineering challenges including component slippage, premature wear, and alignment inaccuracies in manufacturing and automation sectors.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and shoulder diameter tolerance of -0.004" to -0.002". The UNC coarse thread profile ensures reliable engagement in various materials. Compliant with ASME B18.3 specifications (ASTM A574), RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) regulations for hazardous substance restrictions. The shoulder length maintains -0.005" to 0.005" tolerance for consistent dimensional accuracy across production batches.