S-91381A358 5/16"-24 x 1/4" 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 holding power with Class 3A thread fit for reliable, vibration-resistant fastening in demanding applications
- Precision-engineered UNF fine threads provide enhanced engagement and superior clamping force compared to coarse threads
- Durable black-oxide alloy steel construction offers excellent corrosion resistance and long-term reliability in industrial environments
- Protective brass soft tip prevents damage to mating surfaces while maintaining secure positioning
- Consistent Rockwell C28 hardness ensures optimal strength and durability without compromising machinability
- Compact headless hex drive design allows for flush installation in space-constrained applications
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for worry-free global sourcing
Professional Applications & Engineering Value
This 5/16"-24 UNF set screw delivers exceptional engineering value in precision assembly applications where vibration resistance and surface protection are critical. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the Rockwell C28 hardness needed for repeated adjustments without thread deformation. The fine thread UNF configuration with Class 3A fit ensures maximum thread engagement and clamping force, making it ideal for precision machinery, automotive components, and industrial equipment where loosening under vibration is a concern. The brass soft tip is particularly valuable in applications involving delicate shafts, precision gears, or finished surfaces where marring must be avoided while maintaining secure positioning.
Specification Summary & Compliance
This set screw features precision 5/16"-24 UNF fine threads with Class 3A thread fit for superior dimensional accuracy and consistent performance. Manufactured to ASME B18.3 specifications with Rockwell C28 hardness and black-oxide surface treatment on alloy steel. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance.
