S-91440A552 1/4"-20 x 2 1/2" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws
Steel Round Head Combination Phillips/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 for extended service life in demanding environments
- Exceptional load-bearing capacity with 60,000 psi tensile strength to withstand high-stress applications
- Optimized drive compatibility featuring both Phillips and slotted drive options for flexible installation
- Reliable thread engagement with fully threaded UNC coarse thread design for faster assembly and secure fastening
- Precision thread fit with Class 2A tolerance ensuring consistent performance and interchangeability
- Enhanced durability with Rockwell B70 hardness providing excellent resistance to wear and deformation
- Regulatory compliance meeting ASME B18.6.3 standards and environmental regulations for worry-free procurement
Professional Applications & Engineering Value
This zinc-plated steel rounded head screw delivers exceptional engineering value for industrial applications where corrosion resistance and high tensile strength are critical. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in structural assemblies, machinery, and heavy equipment. The fully threaded UNC coarse thread design provides maximum thread engagement for superior holding power, while the dual Phillips/slotted drive options offer installation flexibility in confined spaces. The zinc plating creates a protective barrier against environmental factors, making these industrial screws ideal for outdoor equipment, manufacturing facilities, and construction applications where durability and long-term performance are essential.
Specification Summary & Compliance
This 1/4-20 x 2-1/2" screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent performance. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and quality assurance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
