S-90087A548 1/4"-20 x 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, extending service life in harsh industrial environments.
- Excellent thread-cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapping, reducing installation time and labor costs.
- Optimized torque transfer via No. 3 Phillips drive and pan head design, minimizing cam-out and ensuring secure fastening.
- Reliable coarse UNC threading (1/4"-20) provides strong holding power and quick assembly in various materials.
- Full threading along the 2" length ensures consistent grip and uniform stress distribution for enhanced joint integrity.
- Compliance with ASME B18.6.3 standards guarantees dimensional accuracy, interchangeability, and consistent quality for industrial applications.
- RoHS 3 compliance ensures environmental safety and meets global regulatory requirements for hazardous substances.
Professional Applications & Engineering Value
This zinc-plated steel tapping screw is engineered to address common challenges in metalworking and fabrication, such as material fatigue and corrosion. The thread-cutting F-type design with a blunt tip and coarse UNC threads efficiently forms mating threads in aluminum, brass, cast iron, and sheet metal, eliminating the need for separate tapping operations and reducing assembly errors. The Phillips drive (No. 3 size) and rounded pan head profile ensure easy installation with standard tools, while the zinc plating provides a durable barrier against rust and oxidation. Ideal for HVAC systems, automotive assemblies, and machinery, this screw delivers reliable performance in high-vibration and load-bearing applications, enhancing structural stability and longevity.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with a Class 2A fit for standard tolerance, ensuring precise thread engagement. It is fully threaded with a round shank and blunt tip, manufactured in compliance with ASME B18.6.3 and SAE J933 specifications for dimensional consistency. The product is RoHS 3 (2015/863/EU) compliant, adhering to restrictions on hazardous substances, and meets industry standards for use in metal fastening applications.
