S-90086A644 5/16"-18 x 1" 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, ensuring long-lasting performance in demanding industrial environments.
- Efficient self-tapping installation with Type F thread cutting design, eliminating the need for pre-tapped holes in materials like aluminum and cast iron.
- Secure flush mounting thanks to the standard flat head profile and 82° countersink angle, providing a smooth, professional finish.
- Reliable drive engagement with No. 4 Phillips drive, reducing cam-out and enhancing installation speed and control.
- Excellent holding power from coarse UNC threads and full threading along the 1" length, ensuring strong, vibration-resistant connections.
- Broad material compatibility for use in aluminum, brass, cast iron, and sheet metal, offering versatile fastening solutions.
- Compliance with industry standards including ASME B18.6.3 and RoHS 3, guaranteeing quality and environmental safety.
Professional Applications & Engineering Value
This 5/16"-18 UNC thread cutting screw is engineered to solve common fastening challenges in industrial assembly. Its Type F tapping method and coarse UNC thread enable quick, secure installation in ductile materials like aluminum, brass, and cast iron, reducing labor time and eliminating tap breakage risks. The zinc-plated steel material offers durability against corrosion, while the flat head with 82° countersink ensures a flush fit, preventing snagging and improving aesthetics in sheet metal applications. Fully threaded for maximum grip, these screws deliver reliable performance in automotive, machinery, and construction projects, enhancing productivity and joint integrity.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with a thread diameter of 0.313" and is fully threaded for consistent engagement. It meets ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance, ensuring reliable fastening in industrial settings. Additionally, it is RoHS 3 (2015/863/EU) Compliant, adhering to environmental regulations for hazardous substance restrictions. The design includes standard tolerances for precise fit and universal compatibility.
