S-91375A408 9/16"-18 x 1" 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 finish, extending service life in demanding environments
- Exceptional thread precision with Class 3A fit ensures vibration-resistant, secure fastening in critical assemblies
- High-strength alloy steel construction with Rockwell C45 hardness provides reliable load-bearing capacity
- Secure installation and removal through 1/4" hex drive in headless design for space-constrained applications
- Enhanced grip and positioning with cup tip design prevents component slippage during operation
- Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
- Fine thread spacing (18 TPI) delivers improved adjustment precision and clamping force distribution
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications where vibration resistance and corrosion protection are paramount. The 9/16"-18 UNF fine threads with Class 3A fit maintain precise alignment in machinery, automotive, and manufacturing equipment, preventing loosening under dynamic loads. The headless design with 1/4" hex drive enables installation in confined spaces while the cup tip securely engages mating surfaces without damaging components. Engineered for high-strength applications, this fastener provides reliable performance in power transmission systems, precision instruments, and heavy-duty equipment where long-term reliability is essential.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit ensuring precise dimensional accuracy. The UNF fine thread (9/16"-18) provides superior clamping force distribution. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming suitability for global industrial markets. Material certification includes Rockwell C45 hardness verification for consistent mechanical properties across production batches.
