S-90275A128 5-40 x 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 demanding environments
- High-strength performance with 60,000 PSI tensile strength and Rockwell B70 hardness for reliable load-bearing applications
- Precise flush mounting thanks to the 82° countersink angle and standard flat head profile for seamless surface integration
- Easy installation and removal with slotted drive design compatible with standard hand tools
- Consistent thread engagement ensured by Class 2A thread fit and fully threaded UNC coarse thread design
- Broad industrial compliance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3 & REACH)
- Versatile right-hand threading suitable for general-purpose assembly in machinery, electronics, and structural components
Professional Applications & Engineering Value
These 5-40 UNC flat head slotted screws deliver exceptional engineering value in applications requiring flush surface finishes and high mechanical strength. The zinc-plated steel construction provides essential corrosion protection for industrial equipment, automotive assemblies, and electronic enclosures exposed to humidity or mild chemicals. The coarse UNC threads and Class 2A thread fit ensure rapid installation with reduced cross-threading risks, while the 82° countersink angle allows precise seating in chamfered holes for vibration-resistant joints. With full threading along the 1/2" length, these screws maintain consistent clamping force across materials of varying thicknesses, making them ideal for securing panels, brackets, and machinery components where disassembly may be required.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards, these screws feature UNC coarse threads with Class 2A tolerance for consistent fit. The zinc-plated steel meets Rockwell B70 hardness and 60,000 PSI tensile strength requirements. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety for global industrial supply chains.
