S-97345A975 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B79 hardness for reliable performance under heavy loads.
• Precise alignment and location provided by the 5" shoulder with tight diameter and length tolerances for consistent assembly.
• Secure, high-precision threading with Class 3A UNC coarse thread fit, ensuring minimal backlash and superior vibration resistance.
• Easy installation and removal using the 1/2" hex drive and knurled head for enhanced grip, even with gloves or tools.
• Long-term reliability in demanding applications due to compliance with ASME B18.3, RoHS 3, and REACH standards.
• Versatile industrial use as a durable shoulder bolt for machinery, fixtures, and rotating assemblies requiring a precise pivot or axle.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 5" shoulder length with controlled tolerances ensures exact component positioning, reducing wear and misalignment in rotating assemblies, jigs, and fixtures. Its Class 3A thread fit and UNC coarse thread provide superior resistance to loosening under vibration, making it ideal for heavy machinery and automation equipment. The knurled head and 1/2" hex drive facilitate quick, secure installation in confined spaces. With high tensile and shear strength, this socket head shoulder bolt delivers reliable performance in corrosive or high-stress environments, from food processing to chemical handling systems.

Specification Summary & Compliance

This shoulder screw features a 3/4"-10 UNC thread with Class 3A fit for precise engagement. The shoulder diameter is 7/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 5" with a tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional consistency and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental and safety standards are upheld for industrial use.