S-90276A110 4-40 x 1/2" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round Head Slotted 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, ideal for harsh industrial environments
- High tensile strength of 60,000 PSI ensures reliable load-bearing capacity and structural integrity
- Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
- Class 2A thread fit offers consistent, reliable fastening with standard UNC coarse threads
- Fully threaded design allows for maximum grip and uniform stress distribution along the entire length
- Slotted drive rounded head enables easy installation with standard tools while maintaining a low-profile appearance
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality, safety, and environmental responsibility
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver exceptional performance in demanding industrial settings where corrosion resistance and mechanical strength are critical. The zinc-plated steel construction provides a protective barrier against oxidation and environmental factors, significantly extending service life in applications exposed to moisture or chemicals. With 60,000 PSI tensile strength and Rockwell B69 hardness, these fully threaded screws maintain integrity under vibration and dynamic loads, making them ideal for machinery assembly, electronic enclosures, and precision equipment. The slotted drive design ensures compatibility with standard tools while the rounded head offers a finished appearance without sharp edges. Engineered to meet ASME B18.6.3 standards, these screws provide reliable fastening solutions for OEM manufacturing and maintenance operations.
Specification Summary & Compliance
This 4-40 UNC screw features precise Class 2A thread fit with coarse threading for optimal engagement and assembly efficiency. Manufactured to ASME B18.6.3 specifications with dimensional accuracy including 1/2" length, 0.211" head diameter, and right-hand thread direction. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while maintaining high performance standards.
