S-90096A347 5/16"-18 x 2 1/2" ASME B18.6.3, SAE J933 Tapping Screws
Tapping 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 corrosion resistance with zinc-plated steel construction for long-lasting performance in demanding environments
- High-torque installation capability thanks to the external hex drive design that prevents tool slippage
- Excellent material compatibility with self-tapping F-type thread cutting for aluminum, brass, cast iron, and sheet metal
- Enhanced holding power through the flange design that distributes load and prevents pull-through
- Reliable coarse threading with UNC 5/16"-18 pattern for faster installation and reduced cross-threading risk
- Full-length threading ensures maximum engagement strength across the entire 2 1/2" length
- Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance
Professional Applications & Engineering Value
These zinc-plated steel tapping screws deliver exceptional value in industrial fastening applications where material integrity and installation efficiency are critical. The thread cutting design (Type F) with blunt tip and coarse UNC threading creates precise mating threads in softer materials like aluminum, brass, and cast iron without pre-tapping. The external hex drive accommodates high torque applications while the integrated flange provides superior clamping force distribution, eliminating the need for separate washers. This combination addresses common challenges in sheet metal fabrication and metal assembly by reducing installation time, minimizing material stress, and providing reliable, vibration-resistant connections that maintain integrity under dynamic loads.
Specification Summary & Compliance
This 5/16"-18 thread cutting screw features UNC coarse threads with Class 2A fit tolerance and full threading along its 2 1/2" length. Manufactured to ASME B18.6.3 specifications SAE J933, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant and requires a 0.281" (K drill bit) pilot hole for optimal installation in designated materials including aluminum, brass, cast iron, and sheet metal applications.
