S-90821A460 Length 2 1/2" Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Superior corrosion resistance with galvanic barrier coated 18-8 stainless steel construction for extended service life in harsh environments
- Efficient thread-forming design creates strong, permanent threads in aluminum and sheet metal without pre-drilling
- Integrated drilling tip technology eliminates secondary drilling operations, saving time and labor costs
- External hex drive with flanged head provides superior torque transmission and increased bearing surface for secure fastening
- Heavy-duty 2-1/2" length accommodates thicker material assemblies while maintaining full thread engagement
- BSD standard compliance ensures reliable performance and interchangeability in industrial applications
- Maximum drilling capacity of 0.187" handles standard sheet metal thicknesses with optimal efficiency
Professional Applications & Engineering Value
These thread forming tapping screws are engineered specifically for challenging aluminum and sheet metal applications where corrosion resistance and installation efficiency are critical. The galvanic barrier coated 18-8 stainless steel construction prevents galvanic corrosion when fastening dissimilar metals, while the integrated drilling tip eliminates the need for separate pilot holes, significantly reducing assembly time. The flanged hex head design distributes clamping force evenly and resists cam-out during high-torque installation. These BSD standard screws deliver reliable performance in HVAC systems, electrical enclosures, metal fabrication, and industrial equipment where vibration resistance and long-term durability are essential.
Specification Summary & Compliance
This No. 12 size tapping screw features a 0.216" thread diameter with 14 threads per inch and 2-1/2" length with full threading. The external hex drive measures 0.313" across flats with a 0.432" flange diameter for enhanced load distribution. Manufactured to BSD tapping screw standards with thread forming technology, these screws are RoHS 3 (2015/863/EU) compliant for environmental safety and suitable for industrial applications requiring reliable metal-to-metal fastening solutions.
