S-94115A581 5/16"-18 x 3/4" ASME B18.3 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 on Alloy Steel, extending service life in harsh industrial environments
- Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
- Nylon 6/6 plastic tip protects mating surfaces from damage while maintaining grip under -50° to 250° F temperature swings
- High-strength Rockwell C28 hardness provides reliable, repeated clamping force without deformation
- Compact headless hex drive design allows installation in confined spaces with standard 5/32" tools
- Coarse UNC thread profile enables rapid installation and high resistance to vibration loosening
- Full regulatory compliance including RoHS 3 and REACH for global supply chain integration
Professional Applications & Engineering Value
Engineered for demanding industrial set screw applications, this Black-Oxide Alloy Steel fastener solves common engineering challenges in machinery alignment and component retention. The headless hex drive configuration permits flush mounting where protruding fasteners are impractical, while the Class 3A thread fit maintains positional accuracy in precision equipment. The Nylon 6/6 plastic tip eliminates galling on shafts and rotating components, making it ideal for adjustable collars, pulleys, and gear hubs. With its coarse UNC thread and Rockwell C28 hardness, this 5/16"-18 set screw delivers vibration-resistant clamping in automotive, manufacturing, and heavy equipment applications where thermal cycling and dynamic loads are concerns.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit tolerances for precision assembly. The 5/16"-18 UNC coarse thread provides optimal engagement in most materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for international markets. Right-hand thread direction and 5/32" hex drive conform to industry-standard installation practices.
