S-90273A550 1/4"-20 x 2" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips Flat Head 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 harsh industrial environments.
- High tensile strength of 60,000 psi provides reliable holding power for demanding applications, reducing the risk of fastener failure.
- Rockwell B70 hardness offers excellent durability and resistance to wear, maintaining integrity under repeated stress.
- Fully threaded UNC coarse design allows for faster installation and stronger grip in a variety of materials.
- Class 2A thread fit ensures consistent, easy assembly with standard nuts and tapped holes, minimizing production delays.
- Phillips drive with No. 3 size enables secure, efficient driving with common tools, enhancing installation speed and reducing cam-out.
- 82° countersink angle and flat head profile facilitate a flush finish, ideal for applications where a smooth surface is critical.
Professional Applications & Engineering Value
This zinc-plated steel flat head screw is engineered to address common industrial challenges, such as corrosion and mechanical stress in assembly lines, machinery, and structural frameworks. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures it withstands heavy loads and vibrations, reducing maintenance needs. Featuring a fully threaded UNC coarse thread and Phillips drive, it allows for quick, secure fastening in metals, wood, and composites, while the flat head with 82° countersink provides a seamless fit for aesthetic and safety-critical applications. Ideal for OEM manufacturing, automotive, and construction sectors, this screw delivers reliable performance where precision and durability are paramount.
Specification Summary & Compliance
This product adheres to precise dimensional standards, including Class 2A thread fit for consistent assembly and UNC coarse threading with a 1/4"-20 size. It complies with ASME B18.6.3 specifications for quality and performance, and meets environmental regulations such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring safe and sustainable use in industrial settings.
