S-92505A750 1/2"-20 x 1/2" 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
- Precise Class 3A thread fit ensures tighter tolerances and more reliable fastening than standard Class 2A alternatives
- Exceptional hardness (Rockwell C45) provides excellent wear resistance and prevents thread deformation under high stress
- Extended tip design creates deeper engagement and superior resistance to loosening in dynamic applications
- Headless hex drive configuration allows for flush mounting in space-constrained assemblies while providing secure tool engagement
- Fine UNF thread spacing delivers improved adjustment precision and vibration resistance compared to coarse threads
- Full regulatory compliance meets ASME B18.3, RoHS 3, and REACH standards for global industrial applications
Professional Applications & Engineering Value
This black oxide alloy steel set screw with Class 3A UNF fine threads addresses critical engineering challenges in precision machinery, automotive components, and industrial equipment. The extended tip design penetrates deeper into mating surfaces, creating permanent positioning that resists vibrational loosening - a common failure point in rotating assemblies. The Rockwell C45 hardness ensures the hex drive maintains integrity during high-torque installation, while the headless configuration enables seamless integration where protruding fasteners are impractical. Ideal for securing gears, pulleys, and collars on shafts, this 1/2"-20 UNF set screw provides engineers with a reliable fastening solution that maintains precision alignment in the most demanding applications.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision applications. Features 1/2"-20 UNF fine threads with right-hand direction, 1/2" length, and extended tip (0.13" length, 0.343" diameter). The black oxide alloy steel construction provides Rockwell C45 hardness for durability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use in global markets.
