S-91375A740 1/2"-20 x 2" ASME B18.3, ASTM F912 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
- High-strength performance from Rockwell C45 hardened alloy steel, preventing deformation under heavy loads
- Secure headless design with 1/4" hex drive for flush installation in confined spaces and tamper-resistant applications
- Enhanced grip capability with cup point tip that creates permanent seating in shafts and collars
- Industry-standard compliance meeting ASME B18.3 specifications for guaranteed dimensional accuracy and reliability
- Environmental responsibility through RoHS 3 and REACH compliance for sustainable manufacturing practices
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring permanent positioning and torque transmission. The Class 3A thread fit with 1/2"-20 UNF fine threads provides superior resistance to vibrational loosening in machinery, automotive, and aerospace assemblies. The headless design with 1/4" hex drive enables installation in space-constrained applications while maintaining flush surfaces. The cup point tip bites securely into mating surfaces, preventing component slippage in high-torque scenarios. With Rockwell C45 hardness, this fastener maintains structural integrity under repeated stress cycles, making it ideal for permanent set applications in pulleys, gears, and collars where reliability is paramount.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread fit precision and UNF fine thread spacing. The 1/2"-20 thread size with right-hand direction ensures compatibility with standard industrial components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to international substance restriction requirements for industrial fasteners.
