S-91979A408 8-32 x 1/4" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant fastening in critical assemblies
• Enhanced installation efficiency through hex drive design requiring only a 5/64" Allen wrench for quick, secure tightening
• Maximum holding power with cup point tip that bites into shafts and components to prevent rotational slippage
• Pressure equalization capability via vented design (0.042" vent diameter) preventing air or fluid lock during installation
• Space-saving headless profile allowing flush mounting where clearance is limited without compromising strength
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers exceptional engineering value in demanding industrial applications where precision and reliability are paramount. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery operating in humid or chemically aggressive environments, while the Class 3A thread fit ensures consistent, tight tolerances that resist loosening under vibration in automotive, aerospace, and manufacturing equipment. The unique vented cup point design solves common installation challenges by allowing air escape during deep insertion, preventing hydraulic lock while maintaining the screw's superior gripping capability. The headless configuration with hex drive offers ideal solutions for confined spaces in precision instruments, coupling assemblies, and adjustable mechanisms where flush mounting is essential without sacrificing installation torque capability.

Specification Summary & Compliance

This precision fastener features 8-32 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy, measuring 0.164" in thread diameter and 1/4" in length. Manufactured to exacting standards with right-hand thread direction and 5/64" hex drive compatibility. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring responsible manufacturing practices and material safety for global industrial applications.