S-91979A712 5/16"-18 x 3/8" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Exceptional thread precision with Class 3A fit ensuring tight, secure fastening and reduced risk of loosening under vibration
• Maximum holding power through cup point tip design that bites into shafts for permanent, reliable positioning
• Enhanced installation control with 5/32" hex drive allowing high torque application without head interference
• Pressure equalization capability through 0.078" vent diameter preventing fluid or air lock during installation
• Industry-standard compatibility with UNC coarse threads and right-hand direction for seamless integration with existing assemblies
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe use across regulated industries

Professional Applications & Engineering Value

Engineered for precision locking applications, this 5/16"-18 UNC hex headless set screw delivers critical solutions for industrial machinery and equipment assembly. The 18-8 stainless steel composition provides excellent corrosion resistance in demanding environments while maintaining structural integrity. The Class 3A thread fit ensures superior engagement with mating components, eliminating play in high-vibration applications such as motor shafts, gear assemblies, and precision instruments. The combination of cup point design and vented construction addresses common installation challenges - the aggressive tip securely bites into shafts while the vent prevents hydraulic lock during final tightening. This headless set screw is particularly valuable in space-constrained applications where flush mounting is essential, offering reliable fastening without protruding components.

Specification Summary & Compliance

This precision fastener features 5/16"-18 UNC coarse threads with Class 3A thread fit for exceptional dimensional accuracy and tight tolerances. The 3/8" length and headless design with 5/32" hex drive provide consistent installation performance. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and material safety for industrial applications worldwide.