S-90251A182 1/4"-20 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure fastening in high-stress environments
• Superior corrosion resistance thanks to 316 stainless steel construction, ideal for harsh industrial conditions
• Precise thread engagement with Class 3A fit ensuring reliable, tight connections in critical assemblies
• Wide temperature tolerance from -50° to 250°F for stable performance across diverse operating environments
• Enhanced installation control through hex drive design allowing high torque application without head interference
• Optimized grip strength with cup tip design that provides superior biting action on contact surfaces
• Industry compliance assurance meeting ASME B18.3 specifications for consistent quality and reliability

Professional Applications & Engineering Value

This 316 stainless steel set screw delivers exceptional engineering value in demanding applications where vibration resistance and corrosion protection are critical. The nylon patch locking technology creates a permanent chemical bond that prevents loosening under continuous stress, eliminating the need for secondary locking mechanisms. With UNC coarse threading and Class 3A precision fit, installation is streamlined while maintaining secure fastening in machinery, automotive components, and industrial equipment. The hex headless design allows flush mounting in confined spaces, while the cup tip provides maximum gripping force on shafts and collars. Engineered for high-temperature environments up to 250°F, this fastener maintains integrity in manufacturing, marine, and chemical processing applications where reliability is non-negotiable.

Specification Summary & Compliance

This set screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for precision tolerance. Manufactured to ASME B18.3 specifications with Rockwell B80 hardness rating. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries. The nylon patch locking system operates effectively within the specified temperature range of -50° to 250°F.