S-97768A342 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and black oxide finish, ideal for harsh industrial environments.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads.
• Precise Class 3A thread fit for secure, vibration-resistant fastening in demanding applications.
• Knurled socket head provides enhanced grip for easy installation and removal with standard hex tools.
• Durable shoulder design with controlled tolerances offers stable bearing surfaces for rotating components.
• Compliance with ASME B18.3 standards guarantees consistent quality and interchangeability.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global use.

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address common industrial challenges like misalignment, component wear, and fastener failure. The 18-8 stainless steel construction, combined with a black oxide finish, provides superior resistance to rust and corrosion, extending service life in machinery, automotive, and assembly lines. The coarse UNC threading and Class 3A fit ensure quick installation and high clamping force, reducing maintenance downtime. Its knurled socket head allows for secure tool engagement, preventing slippage during torque application. Ideal for pivots, axles, and guides, this screw delivers reliable performance in high-stress environments, supporting efficient production and long-term durability.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for precise tolerance, a shoulder diameter of 3/8" with tight tolerances, and a thread length of 3/4". It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.