S-91375A705 1/2"-13 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
- Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
- Exceptional thread precision with Class 3A fit ensuring reliable, vibration-resistant fastening in critical applications
- High-strength performance backed by Rockwell C45 hardness for maximum load-bearing capacity
- Secure installation with 1/4" hex drive providing positive torque control and preventing tool slippage
- Effective component positioning through cup tip design that creates positive seating on shafts and axles
- Optimized for heavy-duty use with coarse UNC threads enabling quick assembly and high resistance to loosening
- Headless design allowing flush mounting where space constraints exist
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial machinery and equipment assembly. The Class 3A thread fit provides exceptional dimensional accuracy, eliminating play in precision components while the coarse UNC threading ensures rapid installation in high-volume production environments. The cup tip design creates concentrated contact pressure, preventing slippage in rotational applications such as shaft collars, gears, and pulleys. With Rockwell C45 hardness, this fastener maintains structural integrity under extreme vibrational loads and shock conditions common in heavy machinery, automotive systems, and power transmission equipment. The black-oxide surface treatment offers superior corrosion protection without dimensional changes, making it ideal for applications where chemical exposure or atmospheric moisture is present.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread tolerances for precision fit. The 1/2"-13 UNC coarse thread specification ensures compatibility with standard components while the 1/4" hex drive provides industry-standard tool engagement. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest substance restriction requirements for industrial applications worldwide.
