S-90471A163 4-40 x 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
- High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Reliable thread engagement with Class 2A thread fit and UNC coarse threads ensuring secure fastening
- Efficient installation with Phillips No. 1 drive and standard flat head profile for flush mounting
- Full threading coverage providing consistent holding power along the entire 1/2" length
- Regulatory compliance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
- Versatile industrial application with 100° countersink angle for optimal seating in various materials
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel flat head screws deliver exceptional engineering value through their robust material properties and precise manufacturing. The zinc-plated steel construction provides critical corrosion resistance for industrial environments where moisture and chemicals are present, while the Rockwell B70 hardness and 60,000 psi tensile strength ensure reliable performance under mechanical stress. The fully threaded design with Class 2A thread fit guarantees consistent engagement in metal assemblies, electronic enclosures, and machinery components. The Phillips drive and standard flat head profile enable efficient installation in confined spaces, making these screws ideal for applications requiring flush mounting without compromising structural integrity.
Specification Summary & Compliance
These screws feature precise Class 2A thread fit with UNC coarse threads (4-40 size) and maintain dimensional accuracy per ASME B18.6.3 specifications. The manufacturing process ensures consistent 1/2" length with fully threaded coverage and 100° countersink angle. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and material safety standards for industrial use across global markets.
