S-90086A542 1/4"-20 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 for extended service life in demanding environments
- Excellent thread-forming capability with Type F thread cutting design creates secure, permanent threads in various materials
- Maximum holding power through fully threaded design ensures superior grip strength in aluminum, brass, cast iron, and sheet metal
- Secure installation with No. 3 Phillips drive prevents cam-out and provides reliable torque transmission
- Precise countersinking with 82° flat head profile sits flush with material surfaces for clean, professional finishes
- Wide material compatibility specifically engineered for use in aluminum, brass, cast iron, and sheet metal applications
- Reliable coarse threading with UNC 1/4"-20 thread pattern ensures quick installation and strong holding capability
Professional Applications & Engineering Value
These Type F thread cutting screws deliver exceptional engineering value by solving common fastening challenges in metal fabrication and industrial assembly. The zinc-plated steel construction provides essential corrosion protection while the specialized thread cutting design eliminates the need for pre-tapped holes, significantly reducing installation time and labor costs. The UNC coarse threads and fully threaded configuration ensure maximum engagement in aluminum, brass, cast iron, and sheet metal applications, preventing loosening under vibration and thermal cycling. The flat head Phillips drive with standard profile allows for flush mounting in countersunk holes, creating smooth surfaces ideal for industrial equipment, construction projects, and metal enclosures where both performance and aesthetics matter.
Specification Summary & Compliance
These 1/4"-20 UNC coarse thread tapping screws maintain precise Class 2A thread tolerances and feature a standard 82° countersink angle for proper seating. Manufactured to exacting ASME B18.6.3 specifications SAE J933, ensuring consistent quality and dimensional accuracy. The screws are fully compliant with RoHS 3 (2015/863/EU) environmental standards, making them suitable for regulated industries and international projects requiring strict material compliance.
