S-90920A291 5/16"-18 x 1 1/2" ASME B18.6.3 Alloy Steel Torx Flat Head Screws
Alloy Steel Torx 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 plating for extended service life in demanding industrial environments
- Enhanced torque transmission through T40 Torx drive design, reducing cam-out and tool slippage
- High tensile strength rating of 60,000 PSI ensures reliable performance under heavy loads
- Optimal flush mounting with standard 82° countersink angle for smooth surface finishing
- Precise thread engagement with Class 2A UNC coarse threads for quick installation and secure fastening
- Full threading design provides maximum grip length and uniform stress distribution
- Regulatory compliance with major industrial standards including ASME B18.6.3, RoHS 3, and REACH
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver exceptional engineering value in industrial applications where corrosion resistance and high tensile strength are critical. The T40 Torx drive system addresses common installation challenges by providing superior torque transfer, eliminating the stripping issues often encountered with Phillips or slotted drives. The UNC coarse threading ensures rapid assembly in various materials while the 82° countersink angle creates a flush surface finish ideal for machinery, equipment manufacturing, and structural applications. Manufactured to ASME B18.6.3 specifications, these fully threaded screws maintain dimensional consistency for reliable performance in heavy-duty fastening scenarios across automotive, construction, and industrial machinery sectors.
Specification Summary & Compliance
This 5/16"-18 x 1-1/2" flat head screw features precise Class 2A thread fit with UNC coarse thread spacing and right-hand thread direction. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility and workplace safety standards are maintained.
