The Bugle Head Self Drilling Screw (commonly referred to as a “Drywall Tek Screw”) is the specialized fastener required for attaching gypsum board to heavy-gauge metal studs. Unlike standard sharp-point drywall screws used for wood or thin sheet metal, our Bugle Head Self Drilling Screw features a hardened drill point (Tek point) that carves its own pilot hole through structural steel up to 2.5mm thick, eliminating the need for pre-drilling.
Product Overview: Manufactured from C1022A Case Hardened Steel, this Bugle Head Self Drilling Screw is finished in Black Phosphate or Zinc Plating. The unique “Bugle” head shape gently depresses the surface paper of the drywall without tearing it, creating a perfect recess for finishing compound (mud) and tape.
Bugle Head Self Drilling Screw Specifications
| Product Name | Bugle Head Self Drilling Screw / Drywall Tek Screw |
| Standard | DIN 7504 (Reference) / ASTM C954 |
| Material | Carbon Steel C1022A (Heat Treated) |
| Head Style | Bugle Head (Flush Finish) |
| Drive Type | Phillips #2 (PH2) |
| Finish | Black Phosphate (Standard) / Zinc Plated |
Engineering Insight: Why “Bugle” and why “Self-Drilling”?
Understanding the design of the Bugle Head Self Drilling Screw is key to proper application:
- The Bugle Curve: Unlike a flat head (countersunk) screw which has a straight wedge shape, the bugle head has a curved taper. This distributes the compression force over a wider area, preventing the screw from punching all the way through the gypsum core, which would leave the board loose.
- The Drill Point: Standard sharp screws cannot penetrate steel thicker than 0.8mm (20 gauge). For commercial framing (14-20 gauge steel), you must use a self-drilling point to cut through the metal, or the screw will simply spin and burn out.
For more details on drywall fastening, please refer to the Drywall fastener entry on Wikipedia.
Finish Guide: Phosphate vs Zinc
- Black Phosphate: The industry standard for drywall. The slightly porous surface holds paint and joint compound extremely well. It offers mild corrosion resistance suitable for dry interiors.
- Zinc Plated: Shiny silver finish. Used when the screw head might be visible or for non-drywall applications where better rust protection is needed.
Frequently Asked Questions (FAQ)
Q: Can I use these on wood studs?
A: It is not recommended. The drill point removes wood fibers rather than gripping them, resulting in lower pull-out strength compared to a sharp-point screw (Coarse Thread).
Q: What size bit do I need?
A: Almost all Bugle Head Self Drilling Screws (M3.5 / #6, M4.2 / #8) use a standard Phillips #2 bit.
Need Bulk Drywall Screws?
Handan Bolt exports containers of Bugle Head Self Drilling Screws to construction sites worldwide. We offer small box packing (1000pcs) or bulk cartons.
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