S-90251A187 8-32 x 1/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent Nylon Patch thread locker that maintains secure fastening in high-stress environments
• Superior corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Precision thread engagement with Class 3A fit ensuring reliable, tight-tolerance assembly connections
• High-temperature performance with locking effectiveness maintained from -70° to 250°F (-57° to 121°C)
• Space-saving headless design allowing flush mounting where protruding fasteners aren't feasible
• Enhanced torque transmission through 5/64" hex drive that prevents tool slippage during installation
• Secure component positioning with cup point design that bites into materials for positive location

Professional Applications & Engineering Value

This 8-32 UNC Class 3A Nylon Patch locking set screw delivers critical vibration resistance in demanding applications where loosening under dynamic loads is a primary concern. The 18-8 Stainless Steel construction provides essential corrosion protection for machinery, electrical enclosures, and outdoor equipment exposed to moisture and chemicals. The coarse UNC thread ensures rapid installation while the Class 3A fit guarantees precise engagement in tapped holes. With its headless hex drive configuration, this fastener solves space constraints in compact assemblies while the cup point creates positive seating in shafts, collars, and knobs. The integrated Nylon Patch locking technology eliminates the need for separate locking compounds, streamlining assembly processes in automotive, aerospace, and industrial manufacturing applications.

Specification Summary & Compliance

This set screw features 8-32 UNC coarse threads with Class 3A precision tolerance for superior thread engagement. Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and interchangeability. The fastener meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) environmental standards. With a Rockwell B80 hardness rating and right-hand thread direction, this inch-system fastener delivers reliable performance across industrial applications requiring precise component positioning and vibration resistance.