S-8077A345 3/8"-24 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.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress loads.
• Precise alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder fit, reducing wear in assemblies.
• Enhanced durability and wear resistance from the black oxide finish and Rockwell B79 hardness, protecting against abrasion and corrosion.
• Secure and non-slip installation with the knurled socket head and 1/4" hex drive, allowing for firm tool grip and easy torque application.
• Accurate positioning and spacing thanks to the 1" shoulder length with tight tolerances, ensuring consistent part alignment in machinery.
• Broad compliance and reliability meeting ASME B18.3, RoHS 3, and REACH standards for safe, high-quality use in regulated industries.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The UNF fine thread (3/8"-24) and Class 3A fit provide superior holding power and vibration resistance in precision equipment like rotating shafts, bearings, and linkages. The black oxide finish enhances corrosion resistance, making it suitable for applications in marine, chemical, and outdoor environments. With a 1" shoulder length and precise diameter tolerances, it ensures accurate component spacing and reduces wear, while the socket head with knurling allows for easy installation in confined spaces. Ideal for industrial machinery, automotive assemblies, and electronic devices, this screw delivers long-term reliability and performance.

Specification Summary & Compliance

This shoulder screw features a 3/8"-24 UNF fine thread with Class 3A fit for high precision, and a shoulder diameter of 1/2" with tolerances from -0.004" to -0.002" and length of 1" with tolerances from -0.005" to 0.005". It complies with ASME B18.3 specifications for dimensional accuracy, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence in industrial use.