S-91375A812 5/8"-18 x 3/4" ASME B18.3, ASTM F912 Set Screws
Set Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
- Maximum holding power achieved through Rockwell C45 hardness, preventing component slippage under vibration
- Precise thread engagement with Class 3A fit ensuring reliable fastening in critical assemblies
- Enhanced torque transmission via 5/16" hex drive design for secure installation without head interference
- Concentrated contact pressure from cup tip design creating permanent seating in shafts and collars
- Fine thread spacing (18 TPI) providing superior resistance to loosening under dynamic loads
- Regulatory compliance meeting international standards for safe use across multiple industries
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional performance in precision machinery applications where vibration resistance and permanent positioning are critical. The headless design with 5/16" hex drive allows installation in confined spaces while maintaining full torque capability. Engineered with Class 3A UNF threads, this fastener ensures precise fit in high-tolerance assemblies, preventing backlash in power transmission components, shaft collars, and precision gears. The cup tip configuration creates concentrated pressure points that bite into mating surfaces, delivering superior resistance to rotational forces in industrial equipment, automotive systems, and heavy machinery where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision applications. Features 5/8"-18 UNF fine threads with right-hand orientation and 0.625" thread diameter. The 3/4" length provides optimal engagement depth while the Rockwell C45 hardness ensures mechanical durability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making this set screw suitable for global industrial applications requiring verified material safety standards.
