S-91375A406 9/16"-18 x 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 thread precision with Class 3A fit for reliable, vibration-resistant fastening in critical assemblies.
- High tensile strength from Rockwell C45 hardened alloy steel, preventing stripping and deformation under heavy loads.
- Secure installation and removal with 1/4" hex drive, allowing high torque application without head protrusion.
- Enhanced grip and positioning with cup tip design, minimizing component slippage in machinery and rotating parts.
- Wide regulatory compliance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH for global supply chain integration.
- Optimized for fine-thread applications with 9/16"-18 UNF threads, providing superior clamping force in precision engineering.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in high-stress industrial applications where vibration resistance and positional accuracy are paramount. The Class 3A thread fit ensures minimal backlash in precision equipment, while the Rockwell C45 hardness prevents thread galling during repeated adjustments. Engineers specify this headless hex drive set screw for machinery shafts, coupling retention, and robotic assemblies where flush mounting is essential. The fine UNF threads provide superior clamping force distribution compared to coarse threads, making it ideal for securing bearings and pulleys against rotational forces. Combined with REACH and RoHS 3 compliance, this fastener meets stringent environmental regulations without compromising mechanical performance in automotive, aerospace, and heavy equipment applications.
Specification Summary & Compliance
Manufactured to ASME B18.3 and ASTM F912 specifications with Class 3A thread tolerance for precision fit. Features 9/16"-18 UNF fine threads with right-hand direction, 1/2" length, and 1/4" hex drive. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
