S-90251A190 8-32 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure vibration-resistant locking with permanent nylon patch that maintains integrity from -50°F to 250°F
• Superior corrosion resistance thanks to 18-8 stainless steel construction for long service life in harsh environments
• Precise thread engagement with Class 3A fit ensuring reliable fastening in demanding applications
• High mechanical strength with Rockwell B80 hardness providing excellent resistance to deformation
• Easy installation and removal with 5/64" hex drive design requiring minimal clearance
• Positive positioning capability through cup tip design that digs into shafts for secure component mounting
• Industry compliance assurance meeting ASME B18.3 standards and environmental regulations

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers exceptional performance in precision assembly applications where vibration resistance and reliable positioning are critical. The 18-8 stainless steel construction provides excellent corrosion resistance for industrial environments, while the permanent nylon patch thread locker eliminates the need for secondary locking compounds. The Class 3A thread fit ensures precise engagement in components requiring accurate alignment, making it ideal for machinery, automotive, and aerospace applications where vibration-induced loosening must be prevented. The cup tip design creates positive contact points on shafts and collars, maintaining component position under dynamic loads.

Specification Summary & Compliance

This set screw features 8-32 UNC coarse threads with Class 3A thread fit for precision applications, measuring 1/4" in length with 0.164" thread diameter. Manufactured to ASME B18.3 specifications and compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The right-hand thread direction with 5/64" hex drive provides standardized installation across industrial applications.