S-91259A723 3/8"-16 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in demanding applications
• Superior corrosion resistance provided by the black oxide finish, extending service life in harsh industrial environments
• Precision thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
• Enhanced grip and torque application through the knurled socket head design with 1/4" hex drive
• Accurate component alignment facilitated by the 2 3/4" shoulder length with tight diameter tolerance
• Consistent mechanical properties maintained through Rockwell C32 hardness and alloy steel construction
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed interchangeability and reliability

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw delivers critical engineering value in precision machinery and industrial equipment where alignment accuracy and structural integrity are paramount. The alloy steel construction with black oxide finish provides exceptional corrosion resistance while maintaining the high tensile strength required for heavy-duty applications. The 2 3/4" shoulder length with controlled tolerances ensures precise component positioning in assemblies, eliminating misalignment issues in rotating machinery, pivoting mechanisms, and precision guides. The Class 3A thread fit and coarse UNC thread pattern enable quick assembly while maintaining vibration resistance, making these socket head shoulder screws ideal for manufacturing equipment, automotive jigs, and industrial automation systems where reliability cannot be compromised.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with UNC coarse threading (3/8"-16) and maintains tight shoulder diameter tolerance (-0.004" to -0.002") and length tolerance (-0.005" to 0.005") for consistent performance. Manufactured in compliance with ASME B18.3 specifications and ASTM A574 material standards, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict regulatory adherence.