S-90275A110 4-40 x 1/2" ASME B18.6.3 Steel Slotted Flat Head Screws
Steel Slotted 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 demanding environments
- High-strength performance with 60,000 PSI tensile strength and Rockwell B70 hardness for reliable load-bearing applications
- Precision thread engagement with Class 2A UNC coarse threads ensuring consistent, vibration-resistant fastening
- Flush mounting capability featuring standard 82° countersink angle for seamless surface integration
- Full-threaded design providing maximum grip length and superior holding power across the entire fastener
- Industry-standard compliance meeting ASME B18.6.3 specifications for guaranteed dimensional accuracy
- Environmental responsibility with RoHS 3 and REACH compliance for safe, regulated industrial use
Professional Applications & Engineering Value
These 4-40 UNC flat head screws deliver exceptional engineering value through their optimized material and structural design. The zinc-plated steel construction provides essential corrosion protection for industrial equipment, electronic enclosures, and machinery components exposed to environmental challenges. The fully threaded configuration ensures maximum thread engagement in thin materials and tight spaces, while the 82° countersink angle creates a flush finish that eliminates protrusions and improves aerodynamic surfaces. The Class 2A thread fit with coarse UNC threading facilitates quick assembly and disassembly, reducing installation time in high-volume manufacturing operations. These screws effectively address common fastening challenges including vibration loosening, material compatibility issues, and regulatory compliance requirements across multiple industrial sectors.
Specification Summary & Compliance
This 4-40 UNC flat head screw maintains precise Class 2A thread fit tolerances with coarse thread spacing and right-hand thread direction. Manufacturing conforms to ASME B18.6.3 standards ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for regulated industrial applications requiring certified components.
