S-97345A670 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 environments and extended service life.
• High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precision alignment and pivot function enabled by the 1/2" diameter shoulder with tight tolerances, reducing wear and misalignment.
• Secure and easy installation with a knurled socket head and 1/4" hex drive, providing excellent grip and torque transmission.
• Durable thread engagement featuring Class 3A fit UNC coarse threads for robust fastening and vibration resistance.
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, quality-conscious industrial use.
• Versatile mounting capabilities with a 1-1/8" shoulder length, accommodating various component thicknesses and assembly needs.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in machinery and equipment assembly. Its high tensile strength and Class 3A UNC coarse thread ensure secure fastening under dynamic loads, minimizing the risk of loosening in vibrating environments. The precise shoulder diameter and length provide an exact pivot point or spacer, eliminating bushing needs and reducing assembly complexity. The knurled socket head with a hex drive allows for efficient installation in confined spaces, enhancing productivity in industrial automation, conveyor systems, and precision tooling. Made from corrosion-resistant 316 stainless steel, it performs reliably in moist or chemical-exposed settings, offering long-term durability and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC coarse thread with Class 3A fit for precise thread engagement. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 1-1/8" with a tolerance of -0.005" to 0.005", ensuring consistent dimensional accuracy. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements for environmental and safety standards.