S-92311A540 1/4"-20 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-term reliability in harsh environments
• Maximum holding power achieved through Class 3A thread fit precision, ensuring secure fastening in demanding applications
• Exceptional durability with Rockwell B80 hardness, maintaining structural integrity under heavy loads
• Flush installation capability thanks to the headless design, ideal for space-constrained assemblies
• Enhanced torque transmission via the 1/8" hex drive, preventing tool slippage during installation
• Reliable grip from the cup tip design, providing concentrated contact pressure for superior component retention
• Industry compliance assurance meeting ASME B18.3 specifications and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 1/4-20 UNC hex headless set screw delivers critical engineering solutions for industrial applications where vibration resistance and permanent positioning are paramount. The 18-8 stainless steel composition provides excellent corrosion resistance, making it ideal for machinery, automotive components, and outdoor equipment exposed to moisture and chemicals. The Class 3A thread fit ensures precise engagement with mating parts, eliminating play in precision assemblies. The headless design allows for flush mounting in collars, shafts, and pulleys where protruding fasteners are impractical. With its cup tip concentrating pressure on a small contact area, this set screw creates superior resistance to rotational forces in high-torque applications, preventing component slippage in power transmission systems and industrial machinery.

Specification Summary & Compliance

This set screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for superior precision and 3/4" length for optimal engagement. Manufactured to ASME B18.3 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.