S-8077A284 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 environments and extended service life
• Enhanced wear resistance and reduced light reflection provided by the black oxide finish
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and smooth rotation ensured by the 3" shoulder with controlled diameter and length tolerances
• Secure, non-slip installation facilitated by the knurled socket head and 1/4" hex drive
• Reliable, vibration-resistant thread engagement from the coarse 3/8"-16 UNC thread with Class 3A fit
• Guaranteed quality and material safety through compliance with ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to solve critical alignment and pivot point challenges in industrial machinery. The 3" shoulder acts as a precise locating dowel or axle, preventing component misalignment and reducing wear on moving parts. The coarse 3/8"-16 UNC thread with a Class 3A fit ensures rapid assembly and high resistance to loosening under vibration, which is vital for production equipment and heavy-duty assemblies. The combination of 316 stainless steel and a black oxide finish provides exceptional protection against corrosion and galling, making it a durable, long-lasting industrial fastener for applications in manufacturing, automation, and marine environments.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with a Class 3A precision fit. The shoulder has a diameter of 1/2" (tolerance: -0.004" to -0.002") and a length of 3" (tolerance: -0.005" to 0.005"). It is manufactured to meet ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.