S-90291A844 1-72 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure, non-marring fastening with green nylon 6/6 tip that prevents damage to shafts and components while maintaining firm positioning
• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise thread engagement with Class 3A fit ensuring maximum holding power and vibration resistance in fine-thread applications
• Wide temperature tolerance from -50° to 250°F (-45° to 121°C) for reliable performance across diverse operating conditions
• Optimized installation control through .035" hex drive design that prevents cam-out and allows high torque application
• Enhanced durability with Rockwell B80 hardness providing excellent wear resistance and long service life
• Space-saving headless design that enables flush mounting in confined assemblies and rotating machinery

Professional Applications & Engineering Value

This 1-72 UNF fine thread set screw delivers critical engineering solutions for precision assemblies requiring secure component positioning without surface damage. The green nylon 6/6 tip creates a protective interface that eliminates galling and marring on shafts, gears, and precision components while maintaining exceptional clamping force. Manufactured from 18-8 stainless steel, it provides inherent corrosion resistance for demanding environments including marine, food processing, and outdoor equipment. The Class 3A thread fit ensures minimal backlash and superior vibration resistance in high-speed applications, while the headless configuration allows seamless integration into compact designs. These industrial set screws are particularly valuable in precision instruments, motor assemblies, and adjustable mechanisms where component protection and reliable positioning are paramount.

Specification Summary & Compliance

This precision fastener features 1-72 UNF fine threads with Class 3A fit for exceptional dimensional accuracy and tight tolerances. Manufactured in compliance with ASME B18.3 specifications, it ensures consistent performance and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, confirming environmental responsibility and material safety. Additional specifications include right-hand thread direction, 0.073" thread diameter, and comprehensive material traceability for quality assurance in industrial applications.