S-91375A639 3/8"-16 x 4 1/2" 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, extending service life in demanding industrial environments
- Exceptional holding power from Class 3A thread precision, ensuring secure fastening with minimal vibration loosening
- Optimized torque transmission through hex socket drive design, preventing tool slippage during installation
- Enhanced material strength with Rockwell C45 hardness alloy steel, resisting deformation under heavy loads
- Reliable engagement from UNC coarse threads, enabling faster installation and reduced cross-threading risks
- Maximum space efficiency with headless design, ideal for confined applications where clearance is limited
- Secure component positioning with cup tip design, providing concentrated contact pressure for permanent assemblies
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for permanent component fixation in high-stress applications. The UNC coarse thread configuration combined with Class 3A thread fit ensures precise engagement in machinery, automotive, and manufacturing equipment, where vibration resistance is paramount. The hex socket drive accommodates standard industrial tools while the headless design maximizes space utilization in collars, gears, and pulleys. With Rockwell C45 hardness, it maintains dimensional stability under repetitive stress, preventing thread stripping in demanding assembly operations. The black-oxide surface treatment provides essential corrosion protection, extending service intervals in humid or chemically aggressive environments.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with material certification to ASTM F912. Features UNC 3/8"-16 coarse threads with Class 3A precision tolerance for superior thread engagement. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
