S-95235A538 1/4"-20 x 1" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon patch locking that maintains integrity up to 250°F, preventing loosening in high-stress applications
• Exceptional mechanical strength from alloy steel construction with Rockwell C45 hardness for reliable, long-term performance under heavy loads
• Precise installation and removal with 1/8" hex drive design, allowing for secure tool engagement in confined spaces
• Enhanced grip and alignment thanks to the extended tip design, ensuring positive contact with mating components
• Reliable thread engagement with Class 3A external thread fit UNC coarse threads, providing consistent clamping force
• Space-saving headless design ideal for applications where flush mounting is required without protruding hardware
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed dimensional accuracy and performance

Professional Applications & Engineering Value

This 1/4"-20 UNC set screw delivers critical engineering solutions for industrial applications where vibration resistance and secure fastening are paramount. The alloy steel construction with Rockwell C45 hardness provides exceptional durability against shear forces and repeated stress cycles, while the nylon patch locking technology creates a permanent friction fit that eliminates the need for additional locking hardware. The extended tip design ensures maximum surface contact with shaft components, preventing slippage in power transmission systems, coupling assemblies, and precision machinery. With its headless configuration and hex drive, this fastener is particularly valuable in confined spaces where traditional bolt heads would interfere with adjacent components, making it ideal for automotive, manufacturing, and heavy equipment applications requiring reliable, maintenance-free performance.

Specification Summary & Compliance

This set screw features 1/4"-20 UNC coarse threads with Class 3A external thread fit for precision engagement. The extended tip measures 0.156" diameter with length of 0.067" and maintains tight tolerances for consistent performance. Manufactured to ASME B18.3 specifications and compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both dimensional accuracy and regulatory adherence for global industrial applications.