S-90471A413 1/4"-20 x 3/4" 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 demanding environments
- High tensile strength of 60,000 psi provides reliable load-bearing capacity for heavy-duty industrial applications
- Rockwell B70 hardness offers excellent durability and resistance to wear during installation and use
- Standard 100° countersink angle enables flush mounting for clean, professional finishes in wood and metal assemblies
- Class 2A thread fit with UNC coarse spacing ensures easy, quick installation and secure fastening in various materials
- Phillips No. 3 drive design delivers efficient torque transfer and reduced cam-out during installation
- Full threading along the 3/4" length provides maximum grip and adjustment flexibility in assembly applications
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver exceptional engineering value across multiple industrial sectors. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in demanding applications where vibration resistance and structural integrity are critical. The UNC coarse thread pattern with Class 2A fit provides superior pull-out resistance in wood, plastic, and thin metal assemblies, while the 100° countersink angle creates seamless, flush surfaces ideal for furniture manufacturing, electrical enclosures, and machinery assembly. The zinc plating offers essential corrosion protection, making these Phillips drive screws suitable for both indoor and outdoor applications where environmental factors pose challenges to fastener longevity.
Specification Summary & Compliance
This 1/4"-20 x 3/4" flat head screw features precise Class 2A thread fit tolerances with UNC coarse thread spacing and right-hand threading. Manufactured to meet ASME B18.6.3 specifications for dimensional accuracy and performance standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial and commercial applications.
