S-91375A844 3/4"-10 x 2 1/4" 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 with black-oxide coating, extending service life in harsh industrial environments
- Superior holding power achieved through Rockwell C45 hardness, preventing deformation under high torque loads
- Precise Class 3A thread fit ensures secure fastening with minimal backlash in critical assemblies
- High-torque hex drive compatibility with 3/8" drive size for reliable installation using standard industrial tools
- Optimized cup tip design creates positive seating and prevents component slippage during operation
- Robust coarse threading (3/4"-10 UNC) enables rapid installation and superior resistance to vibration loosening
- Headless construction allows for flush mounting in space-constrained applications while maintaining full thread engagement
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in demanding industrial applications where vibration resistance and corrosion protection are paramount. The 3/4"-10 UNC coarse thread with Class 3A fit provides exceptional clamping force for securing gears, pulleys, and collars on rotating shafts. The cup tip configuration bites into shaft materials without causing excessive damage, maintaining component integrity while preventing rotational slippage. With Rockwell C45 hardness, these headless set screws withstand repeated adjustments without thread deformation, making them ideal for precision machinery, agricultural equipment, and heavy-duty manufacturing applications where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications and ASTM F912 material standards, these set screws maintain precise Class 3A thread tolerances for consistent performance. The 2 1/4" length with 3/8" hex drive and right-hand UNC coarse threading ensures compatibility with industrial fastening systems. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe use across global manufacturing sectors.
