S-8077A348 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
• Exceptional mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for reliable, heavy-duty performance
• Precision alignment and secure mounting ensured by the 1-1/2" shoulder with tight diameter tolerance for stable component positioning
• High-accuracy fine threading with 3/8"-24 UNF Class 3A fit for vibration resistance and secure fastening in precision assemblies
• Easy installation and removal using the 1/4" hex drive socket and knurled head for improved grip and torque application
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety
• Enhanced durability and longevity from Rockwell B79 hardness, reducing wear and maintenance needs in continuous operations

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 316 Stainless Steel material combined with a Black Oxide finish provides excellent resistance to corrosion, chemicals, and oxidation, making it suitable for demanding environments like marine, chemical processing, and outdoor equipment. The 3/8"-24 UNF fine thread with Class 3A fit ensures minimal backlash and secure retention under dynamic loads, while the precisely machined shoulder offers stable pivoting or spacing in assemblies such as rotating shafts, linkages, and bearing mounts. Its knurled head and hex drive facilitate quick adjustments, reducing assembly time and improving productivity in automated systems and high-precision industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to tight dimensional tolerances, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Thread specifications feature 3/8"-24 UNF fine threads with a Class 3A fit for high precision. Manufacturing and material standards comply with ASME B18.3, and the product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence for global industrial use.