S-91381A364 5/16"-24 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 anti-loosening performance with brass soft tip that prevents damage to mating surfaces while maintaining secure positioning
- Exceptional thread precision with Class 3A fit ensures tight tolerances and reliable fastening in critical applications
- Enhanced corrosion resistance through black-oxide coating on alloy steel for extended service life in demanding environments
- Optimized torque transmission with 5/32" hex drive design allowing for secure installation without head protrusion
- Consistent mechanical properties with Rockwell C28 hardness providing reliable strength and durability
- Industry-standard compatibility with UNF fine thread (5/16"-24) specification for seamless integration into existing assemblies
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global industrial use
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in applications requiring precise component positioning without surface damage. The brass soft tip eliminates marring on shafts, gears, and collars while providing superior vibration resistance. With Class 3A thread fit and UNF fine threading, this fastener maintains critical alignment in machinery, automotive, and precision equipment where tolerance control is paramount. The headless design with hex drive allows for flush installation in confined spaces, making it ideal for adjustable assemblies, coupling retention, and precision mechanical systems. Engineered to withstand industrial environments, the combination of Rockwell C28 hardness and corrosion-resistant coating ensures long-term reliability in demanding applications.
Specification Summary & Compliance
This precision set screw features 5/16"-24 UNF fine threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications with complete compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 1" length and 0.313" thread diameter provide consistent performance across industrial applications, backed by Rockwell C28 hardness certification for guaranteed mechanical properties.
