S-90291A617 3/8"-16 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with durable nylon 6/6 tip that prevents loosening under dynamic loads
• Excellent corrosion protection from 18-8 stainless steel construction for long service life in harsh environments
• Precise thread engagement with Class 3A fit ensuring reliable fastening and consistent torque performance
• Wide temperature tolerance (-50° to 250°F) maintaining tip integrity across industrial applications
• Secure installation through hex drive design providing positive torque transmission without head interference
• Component protection with soft nylon tip preventing damage to mating surfaces during clamping
• Regulatory compliance meeting ASME B18.3 standards for dimensional accuracy and performance

Professional Applications & Engineering Value

This headless set screw with nylon tip delivers exceptional engineering value in applications requiring secure positioning without surface damage. The 18-8 stainless steel construction provides reliable corrosion resistance while maintaining Rockwell B80 hardness for structural integrity. The 3/8"-16 UNC coarse thread with Class 3A fit ensures rapid installation and superior holding power in pulleys, gears, and collars. The green nylon 6/6 tip creates consistent friction locking that withstands vibration better than metal-to-metal contact, making it ideal for rotating assemblies and precision machinery where repeated adjustment is required without compromising component surfaces.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision dimensional control. Features 3/8"-16 UNC coarse threads with right-hand direction and 3/16" hex drive. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The nylon tip maintains performance across the specified -50° to 250°F temperature range while the Rockwell B80 hardness ensures durability in demanding industrial applications.