S-91385A750 1/2"-20 x 3/4" 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
- Vibration-resistant locking with nylon patch thread locker that maintains secure fastening from -50°F to 250°F
- Exceptional thread precision with Class 3A fit ensuring reliable engagement and reduced assembly issues
- Superior corrosion protection through black-oxide coating on alloy steel for extended service life
- High-strength construction with Rockwell C45 hardness providing dependable holding power in demanding applications
- Space-saving headless design with 1/4" hex drive allowing flush installation where clearance is limited
- Optimized grip through cup tip design that concentrates pressure for superior component retention
- Industry compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance where vibration resistance and precise positioning are paramount. The UNF fine thread configuration with Class 3A fit ensures minimal backlash in precision assemblies, while the nylon patch thread locker eliminates the need for separate locking compounds in automotive, machinery, and aerospace components. The headless hex drive design enables flush mounting in confined spaces, and the cup tip provides concentrated clamping force that prevents shaft damage. Engineered for high-temperature environments up to 250°F, this fastener maintains integrity in demanding industrial applications where thermal cycling would compromise standard fasteners.
Specification Summary & Compliance
This 1/2"-20 UNF set screw features Class 3A thread fit for precision applications, manufactured to ASME B18.3 specifications with Rockwell C45 hardness. The product maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread configuration with fine thread spacing ensures optimal engagement, while the 3/4" length and 1/4" hex drive provide standardized installation across industrial equipment.
