S-8077A315 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
• Precise alignment and secure fit ensured by the Class 3A thread fit and standard shoulder, minimizing assembly errors
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, supporting heavy loads and high-stress applications
• Easy installation and removal via the hex socket drive and knurled head, allowing for efficient tool engagement and reduced slippage
• Reliable dimensional stability with tight tolerances on shoulder diameter and length, ensuring consistent performance in precision assemblies
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence for global use

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address common challenges in industrial settings, such as misalignment and corrosion-induced failure. Made from 316 stainless steel and featuring a black oxide finish, it resists rust and chemical degradation in demanding environments like marine, chemical processing, and food machinery. The Class 3A thread fit and precise shoulder dimensions provide stable pivoting and rotational support in assemblies, reducing wear on mating parts. Its coarse thread and right-hand direction facilitate quick installation in equipment requiring frequent adjustments, while the socket head and knurled texture enhance grip for secure fastening in automated systems. Ideal for use in machinery, conveyors, and pivoting joints, this shoulder bolt ensures longevity and reduces downtime, making it a cost-effective solution for B2B procurement.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 standards, with a Class 3A thread fit for high precision in UNC coarse threads. Dimensions include a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring accurate assembly. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible industrial applications.