S-8077A323 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 industrial environments and chemical exposure
• Enhanced durability and wear resistance from the Black Oxide finish, providing long-lasting performance and reduced maintenance
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing in demanding applications
• Precise alignment and positioning thanks to the 1/2" shoulder diameter with tight tolerance, minimizing assembly errors
• Secure and easy installation with a knurled socket head and 1/4" hex drive, preventing tool slippage and speeding up assembly
• Consistent thread engagement from Class 3A UNC coarse threads, offering vibration resistance and reliable fastening
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and heavy-duty equipment. The 316 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in marine, chemical processing, and food industry environments where moisture and chemicals are present. The Black Oxide finish enhances surface hardness and reduces galling, extending service life. The knurled socket head with hex drive ensures secure torque transmission, reducing the risk of stripping during high-torque assembly. With a Class 3A thread fit and precise shoulder dimensions, it enables accurate component positioning in assemblies like bearings, pulleys, and linkages, minimizing misalignment and improving overall system reliability. This screw is ideal for B2B buyers seeking high-strength, corrosion-resistant fasteners that meet rigorous engineering specifications.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC coarse thread with Class 3A fit for high precision and vibration resistance. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and shoulder length is 1/4" with a tolerance of -0.005" to 0.005", ensuring exact alignment. It complies with ASME B18.3 standards for dimensional consistency and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, adhering to environmental and safety regulations. Manufactured from 316 Stainless Steel with Rockwell B79 hardness, it meets specified tensile and shear strength requirements for reliable performance in industrial applications.