S-91375A855 3/4"-16 x 5/8" 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, extending service life in demanding industrial environments
- Precise Class 3A thread fit ensures tighter tolerances and more reliable fastening compared to standard Class 2A threads
- High-strength alloy steel construction with Rockwell C45 hardness provides exceptional shear and tensile strength for heavy-duty applications
- Secure hex drive engagement with 3/8" drive size prevents cam-out and allows for high torque application
- Fine UNF thread spacing delivers superior vibration resistance and improved load distribution
- Cup tip design creates positive locking action and minimizes component surface damage
- Headless configuration enables flush mounting in space-constrained assemblies
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in precision mechanical systems where vibration resistance and reliable positioning are critical. The 3/4"-16 UNF fine threads with Class 3A fit provide superior holding power in pulleys, gears, and collars, preventing loosening under dynamic loads. The cup tip design concentrates clamping force while minimizing damage to shaft surfaces, making it ideal for permanent positioning applications. With Rockwell C45 hardness, this headless set screw maintains its mechanical properties in high-stress environments, while the black-oxide surface treatment offers reliable corrosion protection without significantly altering dimensions. The 3/8" hex drive ensures secure tool engagement for precise installation torque in automated assembly systems.
Specification Summary & Compliance
This set screw features precision 3/4"-16 UNF fine 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 industrial markets.
