S-98273A120 4-40 x 1/2" Tapping Screws
Tapping 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
- Self-tapping design eliminates the need for pre-tapped holes, reducing installation time and labor costs in brass, cast iron, and sheet metal applications
- Superior corrosion resistance with 410 stainless steel construction ensures long-term reliability in demanding industrial environments
- Optimized thread cutting performance with Type 23/T thread form and coarse UNC spacing provides secure, vibration-resistant fastening
- Efficient installation with Phillips No. 1 drive offers good torque transfer and common tool compatibility
- Maximum holding power through full threading along the entire 1/2" length creates stronger connections in various material thicknesses
- Standard pan head design with rounded profile provides a finished appearance and adequate bearing surface
- Regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance
Professional Applications & Engineering Value
These 4-40 UNC thread cutting screws deliver exceptional engineering value by solving critical fastening challenges in sheet metal, cast iron, and brass applications. The 410 stainless steel construction provides excellent strength and corrosion resistance, while the Type 23/T thread cutting design with blunt tip and coarse spacing creates precise, durable threads without material cracking or stripping. The fully threaded configuration ensures maximum engagement throughout the material thickness, preventing loosening under vibration. With Phillips No. 1 drive compatibility, these tapping screws offer reliable installation using standard tools, making them ideal for manufacturing, assembly lines, and maintenance operations where efficiency and reliability are paramount.
Specification Summary & Compliance
This thread cutting screw features precision 4-40 UNC coarse threads with Class 2A tolerance for consistent performance. The manufacturing conforms to standard tapping screw specifications with right-hand thread direction and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial applications worldwide. Designed for use with No. 41 drill bit (0.096" diameter) for proper hole preparation in various materials.
