S-94105A635 1/4"-28 x 3/8" 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 holding power with Class 3A thread fit for secure, vibration-resistant fastening in critical assemblies
- Superior corrosion resistance from black-oxide coating, extending service life in harsh industrial environments
- High-strength durability provided by alloy steel with Rockwell C45 hardness, preventing deformation under heavy loads
- Precise installation control through 1/8" hex drive and headless design, ideal for confined spaces
- Reliable fine thread engagement with 1/4"-28 UNF specification, ensuring maximum clamping force
- Flat tip design for positive seating and minimal surface damage on components
- Full regulatory compliance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH standards for global industrial applications
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in demanding mechanical systems where vibration resistance and precise component positioning are paramount. The Class 3A thread fit provides tighter tolerances than standard fasteners, eliminating backlash in precision equipment, while the fine UNF threads offer superior holding strength compared to coarse-thread alternatives. The headless hex drive design allows flush mounting in pulleys, gears, and collars where protruding fastener heads would interfere with operation. Combined with Rockwell C45 hardness, this set screw maintains its clamping force under continuous stress, making it ideal for industrial machinery, automotive components, and precision manufacturing equipment requiring reliable, long-term fastening solutions.
Specification Summary & Compliance
This precision set screw features 1/4"-28 UNF fine threads with Class 3A thread fit for exacting dimensional accuracy. Manufactured to ASME B18.3 and ASTM F912 specifications, it ensures consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial applications worldwide.
