S-8077A357 3/8"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Precise alignment and reduced wear thanks to the knurled socket head and Class 3A thread fit for minimal backlash
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for demanding applications
• Reliable performance ensured by compliance with ASME B18.3 standards and RoHS/REACH regulations
• Easy installation and removal with a standard hex drive and right-hand UNF fine threads
• Durable shoulder design featuring a 1/2" diameter and controlled tolerances for stable component mounting
• Versatile industrial use supported by the Rockwell B79 hardness and consistent shoulder length

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with a black oxide finish is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The Class 3A thread fit and UNF fine threading provide secure fastening with high precision, reducing vibration loosening in machinery. The knurled socket head enhances grip during installation, while the 1/2" shoulder diameter ensures accurate positioning of components like bearings and pulleys. Ideal for precision shoulder bolt applications in automotive, aerospace, and manufacturing, it offers long-term reliability under high-stress conditions, backed by its high tensile and shear strengths.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for tight tolerances. Key dimensions include a 3/8"-24 UNF thread size, 1/2" shoulder diameter (tolerance: -0.004" to -0.002"), and 1/2" thread length. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.