S-97768A308 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance from the black oxide finish, extending service life
• High tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance in heavy-duty applications
• Precise Class 3A thread fit ensures secure, vibration-resistant connections in critical assemblies
• Knurled head design provides improved grip for easier manual installation and adjustment
• Standard UNC coarse threading allows for quick assembly and disassembly, reducing installation time
• Hex socket drive with 5/32" size enables efficient torque application in confined spaces

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges such as component misalignment and rotational stress. The 18-8 stainless steel material offers excellent corrosion resistance, while the black oxide finish enhances surface durability and reduces galling. With a 1/4"-20 UNC coarse thread and Class 3A fit, it provides reliable fastening in high-vibration environments like machinery, automotive assemblies, and precision equipment. The shoulder design acts as a precise locating surface, ensuring accurate alignment of moving parts and reducing wear. Ideal for applications requiring repeated adjustments, this screw delivers consistent performance in demanding industrial shoulder screw uses.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for precise tolerance. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005". It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and reliability in industrial applications.