S-94115A578 5/16"-18 x 1/2" ASME B18.3 Set Screws
Set Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Vibration-resistant locking with durable nylon 6/6 plastic tip that prevents loosening under dynamic loads
- Surface protection and corrosion resistance from black-oxide coating on high-strength alloy steel
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening in demanding applications
- Non-marring contact surface thanks to the green nylon tip that protects expensive components from damage
- Wide temperature tolerance with nylon tip performing reliably from -50°F to 250°F in various environments
- Easy installation and removal using standard 5/32" hex drive tools for efficient maintenance
- Space-saving headless design ideal for applications where protruding fastener heads are not feasible
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers exceptional engineering value in industrial applications where vibration resistance and component protection are critical. The UNC Class 3A thread fit provides superior holding power in machinery, automotive assemblies, and precision equipment, while the nylon 6/6 plastic tip eliminates galling and surface damage on shafts, gears, and collars. The combination of high-strength alloy steel with black-oxide surface treatment ensures long-term durability in challenging environments. Engineers specify this hex drive set screw for permanent positioning applications where reliability cannot be compromised, making it ideal for production lines, power transmission systems, and heavy equipment manufacturing.
Specification Summary & Compliance
This set screw features precision 5/16"-18 UNC coarse threads with Class 3A thread fit for tight tolerances and reliable performance. Manufactured to ASME B18.3 specifications with complete compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The component maintains dimensional accuracy throughout its 1/2" length with consistent 0.313" thread diameter and 0.188" nylon tip diameter, backed by Rockwell C28 hardness for optimal strength in industrial fastening applications.
