S-8077A738 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
• Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection and provides a sleek appearance.
• High-strength performance with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliability in heavy-duty applications.
• Precise and secure assembly thanks to the Class 3A thread fit and UNC coarse thread, offering excellent vibration resistance.
• Easy installation and removal with the hex socket drive and knurled head, providing a firm grip and reducing tool slippage.
• Accurate alignment and spacing due to the precision shoulder with tight diameter and length tolerances, minimizing component misalignment.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in industrial settings, such as corrosion, high stress, and misalignment. The black oxide finish enhances surface hardness and reduces galling, while the UNC coarse thread and Class 3A fit provide superior holding power in dynamic environments. Ideal for machinery, automotive, and aerospace applications, it ensures precise component positioning with its shoulder diameter and length tolerances, reducing wear and maintenance costs. Its compliance with ASME B18.3 and environmental regulations makes it a trusted choice for engineers seeking durability and reliability in heavy-duty fasteners.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit and UNC thread type with a 1/2"-13 size. Shoulder dimensions feature tight tolerances (diameter: -0.004" to -0.002"; length: -0.005" to 0.005") for accurate assembly. It meets ASME B18.3 specifications for socket head shoulder screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and suitable for global industrial use.