S-97345A263 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 extended service life.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications.
• Precise shoulder positioning with controlled diameter and length tolerances, ensuring accurate alignment and reduced assembly play.
• Reliable thread engagement with Class 3A UNC coarse threads, providing a secure, vibration-resistant fit.
• Easy installation and removal featuring a knurled hex socket head with a 1/4" drive for superior torque application without slippage.
• Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
• Environmental and safety compliance with RoHS 3 and REACH regulations, making it suitable for global supply chains.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The UNC coarse thread with a Class 3A fit ensures rapid assembly and high resistance to loosening under vibration, while the precisely machined shoulder provides a stable bearing surface for pivoting parts, gears, and linkages. The hex socket head with knurled texture allows for high-torque installation in confined spaces, reducing the risk of tool slip and damage. Made from corrosion-resistant 316 stainless steel, it performs reliably in moist, chemical, or marine environments, minimizing maintenance and replacement costs. Ideal for use in machinery, automotive assemblies, and precision equipment where shoulder positioning and high tensile strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with a 3/8"-16 UNC thread in a Class 3A fit for precise thread engagement. The shoulder features a diameter of 1/2" with a tolerance of -0.004" to -0.002" and a length of 7/16" with a tolerance of -0.005" to 0.005", ensuring consistent dimensional accuracy. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety standards for industrial use.