S-95289A143 1/4"-28 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments
• Precise thread engagement through Class 3A fit and UNF fine threads, providing vibration-resistant secure fastening
• Enhanced installation control with 1/8" hex drive headless design, allowing flush mounting in confined spaces
• Optimized tip performance featuring extended tip design for deeper penetration and superior grip on mating surfaces
• Consistent mechanical strength with Rockwell B80 hardness, maintaining structural integrity under heavy loads
• Reliable industrial compliance meeting ASME B18.3 specifications for dimensional accuracy and performance standards
• Environmental responsibility with RoHS 3 and REACH compliance, ensuring safe use in regulated applications

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The 18-8 Stainless Steel construction combined with fine thread configuration provides superior clamping force retention in machinery, automotive components, and precision equipment. The extended tip design ensures maximum surface contact and prevents loosening in high-vibration environments, while the headless hex drive allows for flush installation in space-constrained assemblies. Meeting ASME B18.3 standards, this fastener maintains precise dimensional tolerances for consistent performance in OEM manufacturing and maintenance applications where reliability cannot be compromised.

Specification Summary & Compliance

This precision fastener features Class 3A thread fit with 1/4"-28 UNF fine threads and right-hand thread direction, ensuring tight tolerances for critical applications. The extended tip maintains precise dimensions with tip length of 0.134" (-0.005" to 0" tolerance) and tip diameter of 0.156" (-0.007" to 0" tolerance). Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing both performance excellence and regulatory adherence for industrial use.