S-94425A830 Length 1" Tapping Screws

Tapping Screws

0485FA00021 Tapping Screws
0485FA00021 Tapping Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0485FA00021
Equivalent to mcmaster :
94425A830

Basic Information

Tapping Screw Type BSD
Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type Hex
Head Width 3/8"
Head Height 0.303"

Dimensions

Length 1"
Flange Diameter 0.55"
Shank Cross Section Round

Thread Parameters

Screw Size 1/4"
Thread Diameter 0.25"
Approximate Threads per Inch 14
Thread Direction Right Hand
Threading Fully Threaded
Locking Type Serrations

Tip & Drive Parameters

Tip Type Drilling
Drive Style External Hex/Torx
Drive Size T30
Drill Tip Type No. 3
Drill Tip Length 5/16"
Tapping Method Thread Forming

Material & Strength

Material Zinc-Plated Steel

Temperature & Environment

For Use In Steel, Sheet Metal

Installation & Application

Maximum Drilling Thickness 0.21"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Enhanced corrosion resistance with zinc-plated steel construction for extended service life in demanding industrial environments
  • Superior driving torque transmission through external hex/Torx T30 dual-drive system that prevents cam-out and tool slippage
  • Vibration-resistant locking capability with serrated flange design that eliminates the need for separate washers and maintains clamp load
  • Reduced installation time and cost with integrated No. 3 drilling tip that eliminates pre-drilling requirements in materials up to 0.21" thickness
  • Optimal thread engagement and holding power through thread-forming design that creates strong, permanent threads in steel and sheet metal
  • Full-length fastening coverage with completely threaded 1" shank for maximum grip range and uniform stress distribution
  • Industry-standard compatibility with BSD tapping screw specifications for reliable performance across various steel and sheet metal applications

Professional Applications & Engineering Value

These 1/4"-14 thread forming tapping screws deliver exceptional value in steel and sheet metal fabrication where vibration resistance and installation efficiency are critical. The zinc-plated steel construction provides reliable corrosion protection for outdoor equipment, electrical enclosures, and HVAC systems. The combination of external hex/Torx T30 drive offers flexibility for high-torque applications while the serrated locking flange prevents loosening under dynamic loads. The integrated No. 3 drilling tip with 5/16" length eliminates secondary operations, reducing assembly time by up to 50% compared to traditional drilling and tapping methods. These BSD tapping screws create permanent, high-strength threads that outperform cut threads in thin materials, making them ideal for automotive panels, machinery guards, and structural frameworks where joint integrity is paramount.

Specification Summary & Compliance

Manufactured to BSD tapping screw standards with precision 1/4"-14 right-hand threads and fully threaded design for consistent performance. Features Class 2A thread tolerances ensuring proper fit and engagement in threaded applications. The 3/8" hex head with T30 Torx drive provides dual-drive compatibility for various installation tools. Complies with RoHS and REACH environmental standards while meeting industry specifications for thread forming screws in metal fastening applications. The 0.55" flange diameter and 0.303" head height provide optimal bearing surface for secure fastening in steel and sheet metal up to 0.21" thickness.

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