Carbon Steel Self-Drilling Screws
Product Overview
This product is a carbon steel hardened Phillips dry-wall self-drilling screw with color zinc passivation surface treatment, in lengths of 25-45mm. It combines the advantages of dry-wall screw countersunk embedding and drill-tail screw self-drilling. It can penetrate both the panel and light steel keels up to 1.8mm in one go without pre-drilling, serving as a general-purpose fastener for interior partition walls and ceilings.
Product Applications
Home and commercial light steel keel gypsum board partition walls, ceilings, and background wall base fixation.
Connection of calcium silicate boards, cement fiber boards, and OSB to light steel keels.
Lightweight indoor assembly of galvanized thin sheets (up to 1.8mm) with decorative panels.
Only suitable for dry or mildly humid indoor environments; not for outdoor use, thick steel plates, or load-bearing steel structures.
Product Features
Trumpet Countersunk Phillips Recess: Completely embedded into the panel after tightening, leaving the wall surface flat for subsequent plastering and painting. Easy to install with power tools without slipping.
Dry-Wall Coarse Thread: Strong grip in gypsum and cement boards, preventing board crumbling or thread stripping, and providing stable fixation that won't loosen.
Self-Drilling Cutting Tail: Built-in drill bit directly penetrates thin light steel; drilling, tapping, and locking in one step, significantly increasing construction efficiency.
Color Zinc Anti-Corrosion Coating: Rust prevention performance superior to black zinc screws, suitable for humid indoor areas without rusting.
Multi-Size Options: Full coverage from 25-45mm, matching installation needs for single-layer, double-layer gypsum boards, and thickened cement fiber boards.
| Material | Carbon Steel |
| Surface Treatment | Color Zinc |
| Head Type | Bugle Head |
| Drive Type | Phillips Recess |
| Thread Type | Fine Thread |
| Screw Diameter | Approx. 3.5mm |
| Screw Length | Optional (25mm to 45mm) |
| Screw Type | Drywall Screw |
| Corrosion Resistance | Medium (Suitable for indoor humid, low-corrosion environments) |
| Compatible Tools | Phillips Screwdriver or Power Tool |

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malingfei@linghongscrew.com

No. 56, Baishizhan Road, Economic Development Zone, Langxi County, Xuancheng City, Anhui Province, China
