S-92991A135 5/16"-24 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring tight, reliable engagement in precision assemblies
• Excellent corrosion resistance from brass construction, ideal for harsh or moisture-prone environments
• Optimized installation torque with the 5/32" hex drive preventing cam-out and tool slippage
• Enhanced durability from Rockwell B55 hardness, maintaining thread integrity under repeated adjustments
• Secure component positioning with the cup tip design providing concentrated contact pressure
• Industry-standard compliance meeting ASME B18.3 specifications for dimensional accuracy and performance
• Safe for regulated industries with RoHS 3 and REACH compliance, free from hazardous substances

Professional Applications & Engineering Value

This brass set screw is engineered to address critical challenges in precision machinery and electrical components where corrosion resistance and non-magnetic properties are essential. The 5/16"-24 UNF fine threads with Class 3A fit deliver maximum engagement in tapped holes, preventing loosening from vibration in motors, instruments, and conveyor systems. The headless design and cup tip allow flush mounting while concentrating clamping force for secure shaft collars, gears, and pulley retention. Manufactured to ASME B18.3 standards, it ensures interchangeability and reliability in OEM assemblies and maintenance applications.

Specification Summary & Compliance

This set screw maintains Class 3A thread tolerance per UNF standards with a 0.313" diameter and fine thread spacing. It conforms to ASME B18.3 dimensional and mechanical specifications, ensuring precision in manufacturing. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety requirements for industrial use.