S-90275A642 3/8"-16 x 4 1/2" 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 harsh environments
- High-load bearing capacity with 60,000 psi tensile strength for demanding industrial applications
- Optimized thread engagement through UNC coarse threading and Class 2A fit for reliable fastening in various materials
- Efficient flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- Enhanced installation control via slotted drive style for precise torque application during assembly
- Consistent performance maintained through Rockwell B70 hardness for dimensional stability under stress
- Full-threaded design providing maximum grip length for superior holding power across the entire fastener
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver critical performance advantages in industrial fastening scenarios where surface flushness and corrosion resistance are paramount. The combination of UNC coarse threads and Class 2A thread fit ensures rapid installation with reliable engagement in wood, metal, and composite materials, significantly reducing assembly time in production environments. The 82° countersink angle provides optimal seating in standard chamfered holes, eliminating protrusions that could interfere with machinery operation or create safety hazards. With 60,000 psi tensile strength and Rockwell B70 hardness, these fully threaded screws maintain structural integrity under vibration and dynamic loads common in construction equipment, manufacturing machinery, and heavy-duty industrial assemblies.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. Features 3/8"-16 UNC coarse threads in right-hand direction with standard flat head profile and slotted drive style. Dimensions include 0.717" head diameter, 0.23" head height, and 4½" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use across global markets.
