S-90778A542 5/16"-18 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through Class 3A thread fit precision, maintaining secure positioning in high-stress applications
• Excellent corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Deep material penetration enabled by 90° cone point design for maximum holding power and anti-loosening performance
• Optimized installation torque transfer with 5/32" hex drive, preventing tool slippage and ensuring proper seating
• Enhanced durability with Rockwell B80 hardness, providing reliable performance under repeated adjustments
• Industry-standard compatibility through UNC coarse threading, ensuring interchangeability with existing equipment
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

This 316 stainless steel set screw delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The UNC coarse threads with Class 3A fit provide exceptional holding power in machinery, automotive components, and manufacturing equipment, preventing loosening under dynamic loads. The precision cone point design with 90° angle ensures deep penetration into shaft materials, creating permanent positioning references while minimizing surface damage. Manufactured to ASME B18.3 specifications, these hex headless set screws offer reliable performance in precision assemblies, electrical enclosures, and marine applications where environmental factors demand superior material properties and compliance with international standards.

Specification Summary & Compliance

This 5/16"-18 UNC set screw features precise Class 3A thread fit tolerances with coarse thread spacing for optimal engagement. The fastener meets ASME B18.3 manufacturing specifications and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Critical dimensions include 3/4" length, 0.313" thread diameter, and 5/32" hex drive size, while material properties include 316 stainless steel construction with Rockwell B80 hardness rating and right-hand thread orientation.