S-8077A534 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure.
• Enhanced durability and wear resistance from the black oxide finish, which also provides a sleek, non-reflective appearance.
• High-strength performance with a tensile strength of 70,000 psi and shear strength of 35,000 psi for demanding applications.
• Precision alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder fit, reducing assembly time and improving machine operation.
• Secure, non-slip installation with the knurled head and 3/8" hex drive, allowing for high torque application without tool slippage.
• Reliable dimensional stability with tight tolerances on shoulder diameter and length, ensuring consistent performance in precision assemblies.
• Compliance with international standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory acceptance for global projects.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial machinery, automation, and precision equipment. The black oxide finish not only enhances corrosion resistance but also minimizes galling in high-friction applications. With its 5/8"-11 UNC coarse thread and Class 3A fit, it ensures quick, secure fastening in assemblies requiring precise alignment, such as rotating shafts, bearings, and linkages. The 4 1/2" shoulder length provides a stable pivot or spacer, reducing wear on moving parts and extending equipment lifespan. Ideal for use in industrial fasteners within manufacturing, automotive, and marine sectors, this screw delivers reliable performance under heavy loads and in corrosive environments, supported by its high tensile and shear strength ratings.

Specification Summary & Compliance

This shoulder screw features precision 5/8"-11 UNC threads with Class 3A fit for tight tolerances and reliable engagement. Dimensions include a shoulder diameter of 3/4" (tolerance: -0.004" to -0.002") and shoulder length of 4 1/2" (tolerance: -0.005" to 0.005"), ensuring consistent performance. Manufactured to ASME B18.3 specifications, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and safety-focused industrial applications.