S-91375A647 1 1/4"-7 x 3" 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
- Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
- Exceptional holding power from Rockwell C45 hardness alloy steel, preventing loosening under heavy loads
- Precise Class 3A thread fit ensuring tight, secure fastening with minimal backlash in critical assemblies
- Easy installation and removal with 5/8" hex drive design, reducing maintenance time and tool slippage
- Maximum penetration and grip from cup point tip, creating permanent seating in rotating components
- Reliable coarse threading (UNC 1 1/4"-7) for quick assembly and resistance to vibration-induced failure
- Full regulatory compliance meeting ASME B18.3, ASTM F912, RoHS 3 and REACH standards for global applications
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in demanding industrial settings where vibration resistance and permanent positioning are paramount. The cup point design bites deeply into shaft materials, creating secure locking for pulleys, gears, and collars that experience rotational forces. With Class 3A thread precision and UNC coarse threading, installation becomes faster while maintaining exceptional clamp load capacity. The Rockwell C45 hardness ensures the hex drive withstands repeated torque applications without stripping, making it ideal for maintenance-heavy equipment, automotive assemblies, and heavy machinery where corrosion-resistant fasteners must endure aggressive operating conditions without compromising mechanical integrity.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 and ASTM F912 specifications, this set screw maintains Class 3A thread fit tolerances for precision assembly. The 1 1/4"-7 UNC coarse thread profile ensures compatibility with standard components while the black-oxide surface treatment provides consistent corrosion protection. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and global market acceptance for industrial applications requiring verified material composition and manufacturing standards.
