S-97345A232 5/16"-18 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.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in heavy-duty applications.
• Precise alignment and pivot function enabled by the 2 3/4" shoulder with tight diameter tolerance, reducing wear on mating parts.
• High-accuracy Class 3A thread fit ensures secure fastening and vibration resistance in demanding assemblies.
• Easy installation and removal with a 3/16" hex socket drive and knurled head for improved grip and torque application.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Durable Rockwell B79 hardness provides excellent wear resistance and maintains integrity under repeated use.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial fastening. The 5/16"-18 UNC coarse thread and Class 3A fit deliver secure, vibration-resistant connections, while the precisely machined shoulder acts as a pivot or spacer, minimizing misalignment and component wear in machinery, automotive, and automation systems. The hex socket drive and knurled head facilitate easy handling in tight spaces, enhancing assembly efficiency. With high tensile and shear strength, it supports heavy loads and dynamic stresses, making it a reliable choice for precision engineering applications where corrosion resistance and long-term performance are paramount.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit and a shoulder diameter tolerance of -0.004" to -0.002" for precise dimensional accuracy. It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations for industrial use.