Bugle Head Self Drilling Drywall Screws 3.5 X 25mm

Product Introduction

The Self-Drilling Drywall Screw is engineered to provide a fast and reliable solution for attaching drywall panels directly to metal framing such as light-gauge steel studs and C-channels. It features a hardened self-drilling tip and deep, sharp threads that penetrate and secure in one step—eliminating pre-drilling and saving significant labor time on site. The precision-formed bugle head seats cleanly without tearing the drywall paper, creating a smooth, recessed surface ready for taping and finishing. Made from high-carbon steel with a corrosion-resistant phosphate or enhanced coating, it ensures lasting performance and durability. Ideal for interior walls and ceilings in both commercial and residential projects, this screw accelerates installation while maintaining consistent, high-quality results.

Product Specifications

• Material: Carbon Steel (Grade C1022A equivalent), case-hardened for point durability.

• Finish / Coating: Standard Black Phosphate or Electro-Zinc Plated. Enhanced coatings are available for greater corrosion resistance.

• Corrosion Resistance: Standard coatings provide protection suitable for interior environments.

• Head Style: Bugle Head (Countersunk) designed for a flush finish.

• Drive Type: Phillips #2, Pozidriv #2, or Square Drive #2. Torx® drive is optionally available.

• Drill Point Style: Fine, hardened point (Style 1 or 2) for penetration into light-gauge steel (typically up to 20-ga. to 14-ga.).

• Thread Type: Sharp, spaced twin-lead thread for fast driving and high pull-out resistance.

• Shank: Fully threaded.

• Standard Diameters: #6, #8 (approximate metric: 3.5mm, 4.2mm).

• Standard Lengths: Common lengths include 1-1/4" (32mm), 1-5/8" (42mm), and 2" (50mm). Custom lengths can be produced.

• Standards: Manufactured to comply with relevant industry specifications for drywall-to-steel fastening.

Key Features & Benefits

Engineered for Single-Step Efficiency

The core innovation lies in its hardened self-drilling tip, which cleanly penetrates light-gauge steel studs and channels without the need for pre-drilled pilot holes. This transforms a two-step process into one continuous operation, drastically cutting installation time and labor costs on every project.

Designed for a Perfect Finish

Achieving a professional surface starts with the screw head. The precision-engineered bugle head is calibrated to seat flush and cleanly, eliminating paper tear-out and minimizing surface distortion. This creates a uniform recess that requires less joint compound and provides a perfectly smooth base for finishing.

Built for Speed and Strength

Performance is driven by sharp, deep threads that ensure rapid penetration and superior holding power. Combined with an optimized drive system (available in Phillips, Pozidriv, or Square), it maximizes torque transfer, reduces cam-out, and allows for faster, more consistent installation with less operator fatigue.

Constructed for Lasting Performance

Durability is ensured through hardened carbon steel construction and a protective corrosion-resistant coating (black phosphate or zinc). This combination safeguards against rust, maintains clamping force over time, and ensures the long-term integrity of the drywall assembly, preventing callbacks and protecting your reputation.

Typical Applications

Metal Stud Partitions: The essential fastener for directly attaching drywall to both structural and non-structural steel studs and tracks, where its integrated drilling capability completely eliminates the time-consuming step of pre-drilling pilot holes.

Suspended Drywall Ceilings: Specifically designed for securing ceiling panels to metal furring channels, hat channels, and support grids, ensuring a perfectly flush, rigid, and level overhead installation that is ready for finishing.

Specialty & Multi-Layer Walls: Provides the critical penetration depth and superior grip required for installing fire-rated, acoustic, or other multi-layer drywall assemblies, ensuring the integrity and performance of complex wall systems.

Renovation & Overlay Projects: Streamlines retrofit work by allowing new drywall to be installed directly over existing metal lath, strapping, or onto metal door and window frames, significantly simplifying the modification and upgrade of existing spaces.

Why Choose Our Self-Drilling Drywall Screws?

Installation Efficiency Optimization

The core design of this screw lies in its integrated self-drilling tip, which allows for direct drilling and fastening into light steel frames without pre-drilling. This design integrates traditional multi-step processes into a single continuous operation, significantly reducing installation time and manual intervention per unit area, directly improving on-site construction efficiency and project schedule control.

Surface Finish Quality Assurance

The screw's countersunk head is precisely engineered and molded to ensure a neat and consistent countersink when screwed in. This design effectively prevents drywall tearing or gypsum core breakage, providing a smooth base for joint treatment, minimizing the amount of leveling material and finishing time required, and ensuring the flatness and professional appearance of the final surface finish.

Construction Process Reliability

The product is manufactured from high-standard carbon steel and undergoes rigorous heat treatment and dimensional control to ensure consistent mechanical properties and drive compatibility in mass production. This significantly reduces common failures such as stripping, breakage, or bit slippage during construction, ensuring the continuity and stability of the installation process and reducing work interruptions caused by tool or consumable issues.

Long-Term System Integrity

The screw material, combined with anti-corrosion surface treatment (phosphating or galvanizing), is designed to maintain its clamping force and corrosion resistance throughout the building's lifespan. This feature is crucial for preventing loosening of connections that may be caused by environmental humidity, material stress relaxation, or minor vibrations, thus ensuring the long-term structural safety and aesthetic integrity of drywall partitions or ceiling systems.

Commitment to Quality & Service

Every batch of our Self-Drilling Drywall Screws is manufactured under a strict quality management system to guarantee consistent performance, dimensional accuracy, and finish durability. We are committed to being your trusted partner by providing solutions that enhance project efficiency, safety, and finish quality. For detailed technical datasheets, volume pricing, or project-specific consultation, please contact our sales and engineering support team.