S-97345A709 3/8"-24 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure.
- Enhanced load-bearing capacity from the 1/2" shoulder diameter providing a stable pivot and precise alignment in assemblies.
- High-strength performance with a 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding mechanical applications.
- Precise thread engagement ensured by the Class 3A UNF fine thread, reducing the risk of loosening under vibration.
- Secure and easy installation with the hex socket drive and knurled head for improved grip during tightening.
- Long-term reliability backed by Rockwell B79 hardness, offering excellent wear resistance and durability.
- Regulatory compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and high-stress industrial assemblies. The 2 1/2" shoulder length and 1/2" shoulder diameter provide a robust, unthreaded bearing surface that maintains exact component spacing and reduces wear on moving parts. The 3/8"-24 UNF fine thread with Class 3A fit ensures tight, reliable fastening in applications subject to vibration, such as rotating shafts and linkages. Combined with the hex socket drive and knurled head texture, it allows for secure installation in confined spaces, making it a preferred choice for OEMs and maintenance engineers seeking durability and precision in corrosive or high-load environments.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit per UNF standards, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for high dimensional accuracy. It is manufactured in compliance with ASME B18.3 specifications and is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.
