S-91375A869 1/4"-20 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications
• Enhanced corrosion resistance from zinc plating, extending service life in harsh industrial environments
• Exceptional durability with Rockwell C45 hardness, resisting wear and deformation under high stress
• Reliable engagement via the cup tip design, providing secure contact and minimizing component slippage
• Easy installation and removal with 1/8" hex drive, allowing efficient maintenance with standard tools
• Broad compatibility due to UNC coarse threading, ensuring quick assembly and reduced cross-threading risks
• Confident compliance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This 1/4-20 UNC set screw is engineered to address critical fastening challenges in industrial settings. Its zinc plated alloy steel construction combats corrosion, while the Class 3A thread fit and coarse thread spacing deliver tight tolerances and rapid assembly, reducing installation time. The headless design and cup tip ensure flush mounting and firm gripping on shafts, collars, and gears, preventing loosening from vibrations. Ideal for machinery, automotive, and equipment manufacturing, it provides a dependable solution for high-strength, right-hand thread applications where reliability is non-negotiable.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit per UNC standards, ensuring precise dimensional accuracy. It meets ASME B18.3 specifications for consistent performance and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity.