S-90289A360 5/16"-24 x 3/8" 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 vibration resistance with serrated locking mechanism that prevents loosening under dynamic loads
- Exceptional thread engagement through Class 3A precision fit for reliable fastening in critical applications
- Enhanced corrosion protection from black-oxide surface treatment extending service life in industrial environments
- Maximum torque transmission via 5/32" hex drive design allowing secure installation without head interference
- Concentrated locking force from cup tip configuration that digs into shaft materials for permanent positioning
- Long-term durability ensured by Rockwell C45 hardened alloy steel construction resisting wear and deformation
- Space-saving installation with headless design ideal for confined assemblies and rotating components
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers engineering excellence for demanding industrial applications where vibration resistance and permanent positioning are critical. The combination of UNF fine threads with Class 3A fit ensures precise engagement in pulleys, gears, and collars, while the cup tip design creates concentrated pressure points that bite into shaft materials without causing excessive damage. The headless configuration with 5/32" hex drive allows installation in space-constrained assemblies where traditional fasteners cannot fit. Engineered to withstand harsh operating conditions, this set screw maintains its locking capability through repeated stress cycles, making it ideal for power transmission systems, rotating machinery, and precision equipment requiring reliable shaft securing solutions.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread fit precision for superior engagement. Features 5/16"-24 UNF fine threads with right-hand orientation and 0.313" thread diameter. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The Rockwell C45 hardness rating ensures consistent performance across industrial applications while maintaining dimensional stability.
