S-90275A092 3-48 x 1/4" 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 thanks to zinc-plated steel construction, extending service life in demanding environments
- High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing capability
- Precise thread engagement with Class 2A fit and coarse UNC threading ensuring secure fastening and vibration resistance
- Optimal flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
- Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance, safe for regulated applications
- Full-thread coverage along the 1/4" length provides maximum grip strength in various material thicknesses
Professional Applications & Engineering Value
These 3-48 UNC zinc-plated steel flat head screws deliver critical performance where corrosion resistance and high tensile strength are paramount. The slotted drive style accommodates traditional installation tools while the standard flat head profile with 82° countersink ensures seamless integration in precision machinery, electronic enclosures, and automotive assemblies. The coarse thread spacing combined with Class 2A thread fit prevents cross-threading during high-volume production, reducing installation errors and maintenance downtime. Fully threaded along the 1/4" length, these industrial fasteners maintain consistent clamping force across varying material densities, from sheet metal to plastic components.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit tolerance for precise engagement. The UNC coarse thread (3-48) ensures reliable performance in most materials. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 0.187" head diameter, 0.059" head height, right-hand threading, and standard flat head profile with 82° countersink angle.
