S-91375A587 5/16"-18 x 1 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 finish, extending service life in harsh industrial environments
- Exceptional holding power from Rockwell C45 hardness, preventing component slippage under high vibration
- Precision Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
- Optimal torque transmission through 5/32" hex drive design, reducing tool slippage during installation
- Deep penetration capability with cup point tip design, creating permanent seating marks on shafts
- Reliable coarse thread engagement with UNC 5/16"-18 specification, ideal for rapid assembly operations
- Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this black-oxide alloy steel set screw delivers exceptional performance in power transmission systems, machinery components, and precision equipment. The Class 3A thread fit provides superior dimensional accuracy for zero-play fastening in high-vibration environments, while the cup point design generates concentrated pressure for permanent shaft positioning. The 5/16"-18 UNC coarse threads enable quick installation in production lines without compromising holding strength. With Rockwell C45 hardness and corrosion-resistant coating, this headless set screw maintains integrity in automotive, manufacturing, and heavy equipment applications where reliability is non-negotiable.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with precise Class 3A thread tolerances for consistent performance. The 5/16"-18 UNC coarse thread configuration ensures proper engagement while the 1½" length provides sufficient thread contact area. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe use across international markets. The black-oxide surface treatment on alloy steel substrate delivers both corrosion protection and reduced light reflection in sensitive applications.
