S-91375A922 1"-8 x 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
- Exceptional corrosion resistance through black-oxide coating, extending service life in demanding industrial environments
- Superior thread engagement with Class 3A fit ensures precise, vibration-resistant fastening in critical applications
- High-strength performance with Rockwell C45 hardness rating maintains structural integrity under heavy loads
- Optimized torque transmission via 9/16" hex drive design for secure installation and removal
- Reliable positioning capability with cup tip design providing excellent grip and minimal surface damage
- Industry-standard compatibility with 1"-8 UNC coarse threads for broad application across equipment and machinery
- Space-saving headless design allows for flush mounting where clearance is limited
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring high-strength fastening and corrosion resistance. The 1"-8 UNC coarse thread configuration with Class 3A fit provides superior vibration resistance in heavy machinery, automotive components, and manufacturing equipment where loosening under dynamic loads is a concern. The cup tip design creates concentrated contact pressure for secure shaft positioning in pulleys, gears, and collars without causing significant surface deformation. With Rockwell C45 hardness, this headless set screw maintains its mechanical properties in high-stress environments, while the black-oxide surface treatment protects against oxidation in humid or chemically aggressive settings. The 9/16" hex drive accommodates standard tools for efficient installation in confined spaces.
Specification Summary & Compliance
This set screw features 1"-8 UNC coarse threads with Class 3A thread fit for precision engagement and meets ASME B18.3 specifications where identified as ASTM F912. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards regarding hazardous substances. Manufacturing follows strict quality controls to ensure dimensional accuracy and mechanical properties suitable for industrial applications requiring reliable, long-term fastening solutions.
