S-90291A866 5/16"-24 ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Superior vibration resistance with a durable nylon 6/6 plastic tip that prevents loosening under dynamic loads
- Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise thread engagement with Class 3A UNF fine threads ensuring reliable, secure fastening in critical applications
- Easy installation and removal using the 5/32" hex drive, providing efficient maintenance and assembly
- Wide temperature compatibility with a nylon tip operating range from -50° to 250°F for versatile use
- Enhanced surface protection with a headless design that minimizes damage to mating components
- Consistent performance backed by Rockwell B80 hardness for dependable mechanical strength
Professional Applications & Engineering Value
This 5/16"-24 UNF Class 3A nylon tip set screw is engineered to address common industrial challenges such as component slippage and vibration-induced loosening in machinery. The 18-8 stainless steel body offers excellent corrosion resistance, while the fine thread design and Class 3A fit provide tight tolerances for precise alignment in assemblies. The nylon 6/6 plastic tip acts as a resilient buffer, preventing marring on shafts, gears, or pulleys, and maintaining clamp force under thermal cycling from -50° to 250°F. Ideal for precision fastening in automotive, aerospace, and manufacturing equipment, this headless set screw with hex drive ensures reliable performance in high-stress applications where space constraints and vibration resistance are critical.
Specification Summary & Compliance
This set screw features a 5/16"-24 UNF fine thread with Class 3A thread fit for high precision, manufactured in accordance with ASME B18.3 standards. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. The Rockwell B80 hardness and specified dimensions, including a 0.313" thread diameter and 5/32" hex drive, guarantee consistent performance in industrial fastener applications.
