S-90390A550 1/4"-20 x 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
- Superior thread cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapping
- Enhanced corrosion resistance with black-phosphate steel coating for extended service life in industrial environments
- Secure T30 Torx drive provides higher torque transmission and reduces cam-out risk compared to standard drives
- 82° countersink flat head design ensures flush mounting and clean finish in assembled applications
- Full threading along 2" length delivers maximum holding power and vibration resistance
- UNC coarse thread profile enables faster installation and reliable performance in soft materials
- Right-hand thread direction with F-type tapping design for consistent, reliable fastening operations
Professional Applications & Engineering Value
These 1/4-20 thread cutting tapping screws solve critical fastening challenges in metalworking and manufacturing. The black-phosphate steel construction provides essential corrosion protection while maintaining high tensile strength. The specialized thread cutting design eliminates the need for separate tapping operations in aluminum, brass, cast iron, and sheet metal, significantly reducing assembly time and labor costs. The T30 Torx drive system prevents tool slippage during high-torque installation, ensuring consistent clamping force in automated production environments. The 82° countersink angle and flat head profile create seamless surface finishes ideal for visible applications in industrial equipment, machinery, and metal fabrications.
Specification Summary & Compliance
Manufactured to precise dimensional standards with UNC coarse threads (1/4"-20) and standard flat head profile. Features fully threaded design with 2" length and blunt tip configuration. Complies with industry standards for F-type thread cutting screws and suitable for use with No. 1 drill bit (0.228" diameter). The black-phosphate surface treatment meets industrial corrosion protection requirements while maintaining RoHS and REACH compliance for safe use in various manufacturing applications.
