S-91375A878 7/8"-9 x 2" 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 for extended service life in harsh industrial environments
- Precise Class 3A thread fit ensures reliable, vibration-resistant fastening in critical assemblies
- High-strength alloy steel construction with Rockwell C45 hardness maintains integrity under heavy loads
- Deep 1/2" hex drive provides maximum torque transmission and prevents tool slippage
- Cup tip design creates positive seating and prevents component damage during installation
- Coarse UNC threading enables quick installation and superior holding power in various materials
- Headless configuration allows for flush mounting in space-constrained applications
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional performance in demanding industrial applications where corrosion resistance and mechanical strength are paramount. The 7/8"-9 UNC coarse thread with Class 3A fit provides superior engagement in pulleys, gears, and collars, preventing loosening under vibration and heavy rotational forces. The headless design with 1/2" hex drive enables installation in confined spaces while maintaining high torque capability. The cup tip concentrates pressure for secure component positioning without damaging shaft surfaces. Engineered for machinery, automotive, and heavy equipment applications, this set screw combines Rockwell C45 hardness with corrosion-resistant coating to withstand aggressive environments while maintaining dimensional stability.
Specification Summary & Compliance
This precision fastener features 7/8"-9 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications (ASTM F912) with Rockwell C45 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The 2" length and 1/2" hex drive provide consistent performance in industrial fastening applications requiring reliable, high-strength set screws.
