S-92505A548 1/4"-20 x 1 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide finish for extended service life in demanding industrial environments
• Exceptional holding power achieved through Rockwell C45 hardness and Class 3A thread fit for vibration-resistant fastening
• Precise component positioning enabled by extended tip design with controlled diameter and length tolerances
• High-torque installation capability through 1/8" hex drive that prevents tool slippage and damage
• Reliable coarse thread engagement with UNC 1/4"-20 specification for quick assembly and disassembly
• Industry-standard compliance meeting ASME B18.3 specifications for consistent performance and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications

Professional Applications & Engineering Value

This black oxide alloy steel set screw delivers critical engineering solutions for industrial assembly challenges. The extended tip design provides precise component alignment in pulleys, gears, and collars, while the Class 3A thread fit ensures zero backlash in high-vibration machinery. The UNC coarse thread facilitates rapid installation in production environments, and the hex drive accommodates high torque requirements without stripping. Engineered for permanent positioning applications, this fastener maintains structural integrity in automotive, manufacturing, and heavy equipment where vibration resistance and corrosion protection are paramount. The combination of Rockwell C45 hardness and controlled tip dimensions guarantees consistent performance in repetitive assembly operations.

Specification Summary & Compliance

Manufactured to ASME B18.3 standards with Class 3A thread fit precision, this 1/4"-20 UNC set screw maintains strict dimensional control including tip diameter (0.156" ±0.007") and tip length (0.067" -0.005" to 0") tolerances. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial supply chains. Right-hand thread direction and coarse thread spacing provide optimal engagement for permanent fastening applications requiring maximum clamping force.