S-90275A553 1/4"-20 x 2 3/4" ASME B18.6.3 Steel Slotted Flat Head Screws
Steel Slotted 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 for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable fastening performance under substantial mechanical loads
- Rockwell B70 hardness rating provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit with UNC coarse spacing enables quick assembly and secure fastening in various materials
- 82° countersink angle with standard flat head profile creates flush surface finishes for streamlined applications
- Fully threaded design maximizes grip length and distributes stress evenly across the entire fastener
- Comprehensive regulatory compliance including ASME B18.6.3, RoHS 3, and REACH ensures quality and environmental safety
Professional Applications & Engineering Value
This zinc-plated steel flat head screw delivers exceptional engineering value for industrial applications where flush mounting and high-strength fastening are critical. The combination of 60,000 psi tensile strength and Rockwell B70 hardness addresses common failure points in heavy-duty assemblies, preventing stripping and deformation under load. The UNC coarse thread spacing with Class 2A fit provides reliable engagement in wood, metal, and composite materials, while the 82° countersink angle ensures proper seating in standard chamfered holes. Ideal for machinery, equipment manufacturing, and structural applications, this fully threaded slotted screw offers consistent performance where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This flat head screw features precise Class 2A thread fit tolerances with UNC 1/4"-20 coarse thread specifications and right-hand threading. Manufactured to ASME B18.6.3 standards with dimensional accuracy including 0.477" head diameter and 2 3/4" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial distribution and use.
