S-91381A583 5/16"-18 x 1" 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 holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications
- Enhanced durability and corrosion resistance through black-oxide alloy steel construction with Rockwell C28 hardness
- Prevents surface damage to mating components with a soft brass tip that maintains secure contact without marring
- Easy installation and removal using a standard 5/32" hex drive, ideal for confined spaces due to its headless design
- Reliable coarse UNC threading for quick assembly and reduced cross-threading risks in industrial settings
- Compliance with major standards including ASME B18.3, ensuring consistent quality and performance
- Environmentally safe usage with RoHS 3 and REACH compliance, meeting global regulatory requirements
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw is engineered to address critical challenges in industrial machinery, automotive assemblies, and precision equipment where vibration resistance and secure positioning are paramount. The black-oxide alloy steel construction provides excellent wear resistance and longevity, while the Class 3A thread fit ensures tight tolerances for minimal backlash. The brass soft tip (0.188" diameter) is specifically designed to protect sensitive surfaces from damage during clamping, making it ideal for use on shafts, collars, and gears without compromising grip strength. Its headless hex drive design allows for flush mounting in space-constrained applications, offering reliable performance in heavy-duty set screw scenarios where durability and precision are non-negotiable.
Specification Summary & Compliance
This set screw features a 5/16"-18 UNC coarse thread with Class 3A thread fit for high precision, a length of 1", and a drive size of 5/32". It meets ASME B18.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use worldwide.
