S-95235A534 1/4"-20 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker prevents loosening under dynamic loads, maintaining assembly integrity up to 250°F
• Precise Class 3A thread fit ensures reliable engagement and consistent clamping force in high-tolerance applications
• Extended tip design provides superior bite and seating in mating components for enhanced fastening security
• Alloy steel construction with Rockwell C45 hardness delivers exceptional strength and durability for demanding industrial environments
• Hex drive configuration allows for high-torque installation while maintaining headless profile for space-constrained assemblies
• Coarse UNC threading enables rapid installation and superior resistance to cross-threading in production settings
• Comprehensive compliance with ASME B18.3, RoHS 3, and REACH ensures material safety and manufacturing consistency

Professional Applications & Engineering Value

This 1/4-20 UNC set screw addresses critical vibration and thermal challenges in industrial fastening systems. The nylon patch thread locker creates consistent friction resistance that maintains clamping force even in high-vibration machinery, eliminating the need for secondary locking mechanisms. The alloy steel composition with Rockwell C45 hardness provides optimal balance between strength and machinability, while the extended tip design ensures positive seating in pulleys, gears, and collars. Particularly valuable in power transmission systems and precision equipment where Class 3A thread fit guarantees repeatable performance and dimensional stability across production runs.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A external thread fit for precision applications. Features 1/4"-20 UNC coarse threading with right-hand direction and 1/2" length. The extended tip measures 0.156" diameter with controlled tolerances. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring material safety and regulatory acceptance for global industrial markets.