S-8077A292 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 extended service life
• Enhanced durability and wear resistance from the black oxide finish, providing added protection against abrasion and galling
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications
• Precise alignment and smooth rotation ensured by the 2-1/2" shoulder with tight diameter tolerance for reduced vibration and part wear
• Secure, slip-resistant installation thanks to the knurled socket head and 1/4" hex drive, allowing for high torque application
• Accurate and reliable threading with Class 3A UNC fit, ensuring consistent engagement and reducing the risk of cross-threading
• Compliance with global standards including ASME B18.3, RoHS 3, and REACH, guaranteeing quality and environmental safety

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial machinery, automation systems, and precision equipment. The black oxide finish not only enhances corrosion resistance but also reduces friction, preventing seizing in high-stress assemblies. The 3/8"-16 UNC Class 3A thread provides superior holding power and vibration resistance, while the precisely machined shoulder acts as a pivot or spacer, maintaining alignment in rotating components like bearings and gears. With a Rockwell B79 hardness and high tensile strength, it withstands heavy loads and repetitive motion, reducing maintenance downtime and ensuring long-term operational reliability in demanding environments.

Specification Summary & Compliance

This shoulder screw features precision 3/8"-16 UNC Class 3A threads with coarse spacing for quick assembly. The shoulder diameter is 1/2" with a tight tolerance of -0.004" to -0.002", and the shoulder length is 2-1/2" with a tolerance of -0.005" to 0.005" for consistent fit. Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and performance reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety standards for industrial use.