S-91381A190 8-32 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for reliable, vibration-resistant fastening in demanding applications
• Enhanced corrosion resistance from black-oxide alloy steel construction, extending service life in industrial environments
• Precise installation control with 5/64" hex drive design, allowing for accurate torque application in confined spaces
• Surface protection through brass soft tip that prevents damage to mating components while maintaining secure positioning
• Optimized thread engagement with UNC coarse threads providing faster assembly and reduced cross-threading risk
• Consistent performance backed by Rockwell C28 hardness, ensuring dimensional stability under mechanical stress
• Regulatory compliance meeting ASME B18.3 specifications for guaranteed interchangeability and quality assurance

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers exceptional engineering value in precision assembly applications where component positioning and vibration resistance are critical. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the mechanical strength needed for permanent fastening solutions. The headless design with hex drive enables flush mounting in space-constrained assemblies, while the brass soft tip eliminates surface marring on shafts, gears, and collars - particularly valuable in precision machinery and automotive components. The Class 3A thread fit ensures tight tolerances for maximum clamping force, making it ideal for high-vibration environments where loosening could compromise system integrity. These set screws are engineered to solve common industrial challenges of component slippage, surface damage, and maintenance-intensive fastening systems.

Specification Summary & Compliance

This precision fastener features 8-32 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and holding capability. Manufactured to ASME B18.3 specifications ensuring consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. The Rockwell C28 hardness rating guarantees optimal strength and durability for industrial applications requiring reliable, long-term fastening performance.