S-92991A576 5/16"-18 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from durable brass construction, ideal for harsh industrial environments
• Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening
• High-strength performance maintained through Rockwell B55 hardness for lasting durability
• Secure installation enabled by 5/32" hex drive design, preventing tool slippage
• Optimized grip from cup tip design provides enhanced holding power in assemblies
• Industry compliance with ASME B18.3 guarantees dimensional accuracy and interchangeability
• Environmental safety through RoHS 3 and REACH compliance for sustainable operations

Professional Applications & Engineering Value

This brass set screw delivers critical engineering advantages where corrosion resistance and precision threading are paramount. The 5/16"-18 UNC coarse thread configuration with Class 3A fit provides superior engagement in soft materials and rapid assembly applications. The headless design with hex drive allows for flush mounting in confined spaces while maintaining high torque capability. Particularly valuable in electrical components, marine equipment, and plumbing systems, this fastener prevents galvanic corrosion while offering reliable vibration resistance. The cup tip creates concentrated pressure points for secure shaft positioning in pulleys, gears, and collars, solving common slippage issues in power transmission systems.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features 5/16"-18 UNC coarse threads with right-hand direction and 0.313" thread diameter. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The Rockwell B55 hardness rating ensures consistent performance under mechanical stress while maintaining brass's inherent corrosion-resistant properties.