S-90086A645 5/16"-18 x 1 1/4" 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, extending service life in demanding industrial environments
- Excellent thread-cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapping requirements
- Reliable fastening power with UNC coarse threading and full threading design for maximum holding strength
- Easy installation and removal with Phillips No. 4 drive style, reducing tool slippage and assembly time
- Precise flush mounting with standard 82° flat head profile for seamless surface integration
- Industry-standard compliance with ASME B18.6.3 specifications ensuring consistent quality and performance
- Environmental responsibility with RoHS 3 compliance, meeting strict international regulatory standards
Professional Applications & Engineering Value
These 5/16"-18 zinc-plated steel tapping screws deliver exceptional engineering value in metal fabrication and assembly operations. The thread cutting Type F design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs in aluminum, brass, cast iron, and sheet metal applications. The UNC coarse threading provides superior pull-out resistance in softer materials, while the zinc plating offers reliable corrosion protection in industrial environments. The combination of fully threaded design and Phillips drive system ensures consistent clamping force distribution and efficient installation across high-volume production lines, making them ideal for automotive, construction, and metalworking industries where durability and assembly efficiency are critical.
Specification Summary & Compliance
These tapping screws feature 5/16"-18 UNC coarse threads with standard Class 2A tolerance, 1 1/4" length, and 0.313" thread diameter. Manufactured to ASME B18.6.3 specifications (SAE J933) with Type F thread cutting design and 82° flat head countersink angle. The products are RoHS 3 (2015/863/EU) Compliant, ensuring environmental regulatory compliance for international industrial applications.
