S-90275A093 3-48 x 5/16" 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
- Excellent flush-mounting capability thanks to the standard 82° flat head profile and countersink angle
- Reliable, coarse UNC threading ensures faster installation and secure holding power in various materials
- High mechanical strength with Rockwell B70 hardness for dependable performance under stress
- Precise Class 2A thread fit guarantees consistent quality and ease of assembly
- Broad industry compliance including ASME B18.6.3, RoHS 3, and REACH for global project suitability
- Simple tool engagement with the traditional slotted drive for straightforward installation and removal
Professional Applications & Engineering Value
Engineered for industrial applications requiring robust and reliable fastening, this 3-48 UNC flat head screw delivers exceptional value. The zinc-plated steel construction provides a protective barrier against corrosion, significantly enhancing durability in harsh operational environments. Its coarse threading and fully threaded design ensure superior grip and vibration resistance, preventing loosening in dynamic assemblies. The 82° countersink angle allows the screw to sit flush with the surface, making it ideal for applications where a smooth finish is critical, such as in machinery, electronics, and metal fabrication. This combination of material strength and precise thread design directly addresses common challenges like material fatigue and assembly inefficiency, offering a trusted solution for B2B procurement of high-performance flat head fasteners.
Specification Summary & Compliance
This screw maintains precise Class 2A thread fit and adheres to UNC coarse thread standards for consistent dimensional accuracy. Manufacturing and quality are governed by ASME B18.6.3 specifications, ensuring reliability across industrial uses. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global supply chains.
