S-97345A741 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Enhanced load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
• Precise component alignment through the 4" shoulder with tight tolerances, reducing assembly errors and improving machine performance
• Secure, high-torque installation enabled by the 1/4" hex socket drive and knurled head for superior grip and reduced tool slippage
• Reliable thread engagement with Class 3A UNC coarse threads, ensuring vibration resistance and long-term fastening integrity
• Compliance with global standards including ASME B18.3, RoHS 3, and REACH for quality assurance and international project suitability
• Durability under stress with Rockwell B79 hardness, maintaining structural integrity in high-stress rotational or pivot applications

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision industrial applications. The 4" shoulder length with controlled diameter and length tolerances provides a stable pivot point or bearing surface, eliminating misalignment in machinery, conveyor systems, and robotic arms. The UNC coarse thread and Class 3A fit ensure rapid assembly and high resistance to loosening under dynamic loads, while the knurled socket head allows for secure tool engagement in confined spaces. Made from corrosion-resistant 316 stainless steel, it performs reliably in moist, chemical, or marine environments, reducing maintenance frequency and downtime. Ideal for use in manufacturing equipment, automotive jigs, and material handling systems, this shoulder screw delivers consistent engineering accuracy and operational longevity.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 3A thread fit for precise, secure fastening. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 4" with a tolerance of -0.005" to 0.005", ensuring high dimensional accuracy. It conforms to ASME B18.3 specifications for consistent manufacturing quality and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety standards for industrial use.