S-8077A412 10-32 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, providing long-lasting performance
• Precise alignment and reduced assembly wear with Class 3A thread fit and standard shoulder fit for consistent mating
• High-strength performance under load with 70,000 psi tensile strength and 35,000 psi minimum shear strength
• Secure, non-slip installation thanks to the knurled head and hex drive design for reliable torque application
• Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
• Fine thread reliability with 10-32 UNF threads ensuring tight fastening in precision applications

Professional Applications & Engineering Value

This 10-32 UNF thread shoulder screw is engineered to address critical alignment and corrosion challenges in demanding industrial settings. The 316 stainless steel material offers exceptional resistance to corrosive elements, making it suitable for marine, chemical processing, and food-grade equipment. The black oxide finish not only enhances corrosion protection but also reduces galling during installation. With a Class 3A thread fit and precise shoulder dimensions, it ensures minimal play and consistent positioning in assemblies like rotating shafts, pivots, and machinery guides. The knurled head and hex drive allow for secure handling in high-vibration environments, reducing the risk of tool slippage and improving assembly efficiency. Ideal for applications requiring reliable shoulder support and fine thread engagement, this screw delivers long-term performance in precision engineering and heavy-duty industrial systems.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit tolerances for precise engagement, with a shoulder diameter of 1/4" (tolerance: -0.004" to -0.002") and shoulder length of 9/16" (tolerance: -0.005" to 0.005"). It conforms to ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.