S-92785A540 1/4"-28 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
• Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Enhanced grip and alignment with 90° cone point design that bites into materials for permanent positioning
• Optimized durability with Rockwell B80 hardness providing excellent wear resistance and mechanical strength
• Precise installation control through 1/8" hex drive that allows high torque application in confined spaces
• Industry-standard compatibility with UNF fine threads (1/4"-28) for perfect fit with corresponding components
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards (RoHS 3/REACH)

Professional Applications & Engineering Value

This 1/4"-28 UNF set screw delivers exceptional engineering value in applications requiring permanent component positioning and vibration resistance. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for machinery exposed to moisture, chemicals, or outdoor elements. The Class 3A thread fit ensures precise engagement with mating parts, eliminating play and maintaining alignment in precision assemblies. The 90° cone point creates a concentrated bearing surface that digs into shafts, collars, and pulleys, preventing slippage under rotational forces. With its headless design and 1/8" hex drive, this set screw installs flush in confined spaces while allowing sufficient torque for secure fastening. These characteristics make it particularly valuable in industrial equipment, automotive systems, and precision instruments where reliable component fixation is critical to operational safety and performance longevity.

Specification Summary & Compliance

This precision set screw features 1/4"-28 UNF fine threads with Class 3A thread fit for superior dimensional accuracy and engagement. The manufacturing process adheres to ASME B18.3 specifications, ensuring consistent quality and performance. Environmental compliance is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, making this fastener suitable for regulated industries. Additional specifications include a 5/16" length, right-hand thread direction, and Rockwell B80 hardness for optimal mechanical properties in industrial applications.