S-8077A282 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Enhanced durability and wear resistance with black oxide finish, providing long-lasting performance
• Precise alignment and smooth rotation ensured by Class 3A thread fit and standard shoulder fit for reduced assembly errors
• High-strength performance with 70,000 PSI tensile and 35,000 PSI shear strength for demanding mechanical applications
• Secure, non-slip installation via knurled head and 1/4" hex drive, allowing for high torque application
• Reliable coarse threading with 3/8"-16 UNC for faster assembly and reduced cross-threading risks
• Industry compliance and safety meeting ASME B18.3, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in precision machinery, automation systems, and industrial equipment. The Class 3A thread fit and UNC coarse threading ensure rapid, secure fastening while minimizing thread galling—common in high-cycle applications. The knurled socket head and 1/4" hex drive provide superior grip for torque-intensive installations, reducing tool slippage. With a 1/2" shoulder diameter and tight tolerances, it offers exact positioning for rotating components like bearings, pulleys, and linkages, eliminating misalignment and extending service life in corrosive or high-stress environments.

Specification Summary & Compliance

This shoulder screw maintains precision with Class 3A thread fit, UNC coarse threads (3/8"-16), and shoulder diameter tolerance of -0.004" to -0.002". Manufacturing adheres to ASME B18.3 specifications, with material hardness of Rockwell B79. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable industrial use.