S-91375A552 1/4"-20 x 2 3/4" 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 protection with black-oxide coating, extending service life in demanding environments
- Exceptional holding power from Rockwell C45 hardness, preventing deformation under high torque
- Precise thread engagement with Class 3A fit, ensuring reliable fastening without cross-threading
- High-torque installation capability through hex socket drive, providing secure tool engagement
- Effective surface gripping with cup tip design, maintaining component positioning under vibration
- Industry-standard compatibility with UNC coarse threads, facilitating easy replacement and interchangeability
- Regulatory compliance assurance meeting ASME, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in applications where vibration resistance and positional accuracy are paramount. The UNC coarse thread with Class 3A fit provides superior engagement in machinery, automotive assemblies, and precision equipment, eliminating the need for frequent retightening. The hex socket drive enables high-torque installation in confined spaces, while the cup tip creates concentrated pressure points for secure shaft-hub connections. Engineered to withstand industrial stressors, this headless set screw maintains component alignment in power transmission systems and rotating assemblies, reducing maintenance downtime and ensuring operational reliability.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with UNC 1/4"-20 coarse threads and Class 3A thread fit for precision tolerance. The 2 3/4" length and 1/8" hex drive provide consistent installation performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets. Material certification confirms Rockwell C45 hardness for maintained mechanical properties in demanding applications.
