S-90275A548 1/4"-20 x 1 3/4" 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
- Enhanced corrosion resistance with zinc-plated steel construction for prolonged service life in demanding environments
- Superior holding power from 60,000 psi tensile strength and Rockwell B70 hardness ensuring reliable fastening under stress
- Quick installation and removal with standard slotted drive design compatible with common tools
- Optimal flush mounting thanks to the 82° countersink angle and standard flat head profile for seamless surface integration
- Consistent thread engagement through UNC coarse threading and Class 2A fit, reducing cross-threading risks
- Full-length threading provides maximum grip along the entire 1-3/4" length for versatile application use
- Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, quality-driven procurement
Professional Applications & Engineering Value
Engineered for industrial and construction applications, this zinc-plated steel flat head screw delivers exceptional durability where flush surface mounting is critical. The UNC coarse thread design ensures rapid assembly in wood, metal, and composite materials, while the Class 2A thread fit maintains precision alignment to prevent stripping. With a tensile strength of 60,000 psi, it withstands vibrational and dynamic loads in machinery, automotive, and structural frameworks. The slotted drive offers broad tool compatibility, making it ideal for maintenance and production lines requiring efficient, repeatable fastening solutions without protruding hardware.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications, featuring a 1/4"-20 UNC coarse thread with Class 2A tolerance for consistent dimensional accuracy. The 82° countersink angle and standard flat head profile ensure proper seating. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances for safe industrial use.
