S-91418A587 5/16"-18 x 1 1/2" 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 Rockwell C45 hardened alloy steel, preventing deformation under high stress
- Precise Class 2A thread fit ensures smooth installation and reliable engagement in UNC coarse threaded applications
- Extended tip design provides enhanced bite and superior resistance to vibration-induced loosening
- Square head configuration allows for high-torque installation with standard wrench tools
- Full regulatory compliance with ASTM F912, RoHS 3, and REACH standards for global industrial use
- Optimized 1-1/2" length with controlled tip tolerances for consistent performance in deep-set applications
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical performance in industrial machinery, automotive assemblies, and heavy equipment where vibration resistance and permanent fastening are paramount. The 5/16"-18 UNC coarse thread configuration provides excellent engagement in softer materials and faster installation times, while the extended tip design creates deeper penetration for superior anti-rotation security. Engineered with Rockwell C45 hardness, this fastener maintains structural integrity under repetitive stress cycles, making it ideal for pulley systems, gear assemblies, and shaft collars where reliability cannot be compromised. The black-oxide surface treatment offers enhanced corrosion protection without significant dimensional changes, ensuring consistent performance in various environmental conditions.
Specification Summary & Compliance
This set screw features Class 2A thread fit tolerance per UNC standards with precise dimensional control including tip diameter tolerance of -0.008" to 0" and tip length tolerance of -0.005" to 0.005". Manufactured in compliance with ASTM F912 specifications for set screws, the product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental compliance for international industrial applications. The inch system measurement and right-hand thread direction follow established industrial fastening standards.
