China's Top Screw Manufacturer
Fine Thread Drywall Screws
Sinsun’s fine thread drywall screws are designed for high-precision installation scenarios. With fine threads (24-32 TPI*), thread density increased by 40%, bite area increased, and tensile strength ≥ 15 pounds, they are the preferred drywall screws for high-end home decoration, commercial space ceilings, and metal keel systems.
1-1/4 Fine Thread Drywall Screws
Sinsun’s Bugle head self-drilling screw is a self-contained drill bit design that can directly penetrate metal plates without pre-drilling. Made of high-hardness steel with anti-rust coating, it is suitable for a variety of indoor and outdoor environments. It is suitable for steel structure roofs, fence installation, light steel keel splicing, etc.
Fine Thread Collated Drywall Screws
Bugle Head Self Tapping Screw is a self-tapping screw that can easily drill holes and form threads directly on metal, plastic or thin wood, eliminating the need for pre-tapping. The tip is sharp and cuts in quickly, It is suitable for furniture assembly, electrical housing fixing, light metal frame connection, etc.
25mm Plasterboard Screws
Our Bugle Head Drywall Screw is a special screw for gypsum board installation. After installation, the nail head naturally sinks into the board surface, keeping the wall surface flat and convenient for subsequent painting or wallpapering. It is suitable for scenes such as suspended ceilings, partition walls, and gypsum board splicing.
38mm Drywall Screws
Our black coated screws are black phosphated, rust-proof and wear-resistant, with a low-profile appearance. Suitable for indoor and outdoor decoration, furniture assembly or fence reinforcement, taking into account both practicality and aesthetics
50mm Drywall Screws
Sinsun’s Galvanised Bugle Screws are screws designed to resist corrosion. The surface is galvanized to prevent rust and moisture, suitable for outdoor or humid environments. They are often used in fence construction, roof fixing, garden furniture assembly and other scenes. They can easily cope with the sun and rain and remain stable for a long time.
60mm Drywall Screws
Sinsun’s 60mm Drywall screws Commonly used for double-layer gypsum board (total thickness of about 25mm) on the wall or ceiling.
When using, you need to control the force to avoid exposing the head too deep or breaking the screws!
Sinsun Self Tapping
Drywall Screw
Core Technical Parameters Of Drywall Screw Fine Thread
√ Thread type Fine thread (24-32 TPI*), thread density increased by 40%, bite area increased, tensile strength ≥ 15 pounds
√ Size range 1″ to 3″ (commonly used 1-1/2″, 2″), suitable for single/double-layer gypsum board and composite wall structure
√ Material process Carbon steel quenching hard core (HRC 52-55°) + anti-rust coating (black phosphating/galvanized coating)
√ Head design Flat head/Flame head, countersunk angle 82°/100°, precisely flush with the gypsum board surface, reducing the amount of filling
√ Advanced technology Self-tapping pointed head, penetrates 0.6-1.2mm metal keel without pre-drilling
√ Certification standard Meets ASTM C954 (metal keel), ASTM C1002 (wood structure) international standards
√ Note: TPI (Threads Per Inch) is the number of threads per inch. The higher the value, the finer the thread.
Core Advantages of Fine Drywall Screw
1. Fine thread structure
Anti-crack and anti-loosening: dense threads disperse stress, reduce the extrusion deformation of the gypsum core when screwing in, and reduce the risk of edge collapse and micro cracks of the board by 90%.
Super strong clamping force: compared with coarse threads, fine threads have 60% more contact points with the keel, and the thread slip rate is reduced by 45% under vibration environment, which is suitable for earthquake zones or high-traffic areas.
Metal keel adaptability: fine threads are easier to cut into thin-walled metal (such as 25GA steel keel), and with self-drilling tips, “zero pre-drilling” efficient construction is achieved.
2. Perfect Flat head design · Extreme flatness
Zero-protrusion countersink: 82° flat head fits perfectly with the tapered hole of the gypsum board, and the screw cap sinks 0.1-0.3mm, leaving uniform space for the plaster layer to prevent nail head penetration.
Anti-over-tightening groove: Some models are equipped with torque release grooves, and the electric screwdriver automatically slips when overloaded to avoid penetrating the plate or damaging the thread.
3. Anti-rust coating · Long-lasting and durable
Black phosphating coating: Basic anti-rust, suitable for dry indoor environments, low friction coefficient, and extended life of power tools.
Galvanizing: Advanced corrosion protection, resistant to bathrooms and basements with humidity ≤85%, and no red rust after salt spray test for more than 48 hours.
- Fine thread design reduces surface stress during installation and effectively prevents cracks.
- The threads are denser and finer, providing stronger grip and control.
- Precisely control the screw-in depth to avoid over-deepening or slipping.
Application Scenario Guide
Light steel keel partition wall: choose 1-1/2″ fine thread + self tapping tip, the fine thread can perfectly bite the edge of the steel keel, and the tip prevents metal curling
Double-layer fireproof gypsum board: choose 2″ fine thread + black phosphate coating, long nails ensure penetration of two layers of boards + keel, and fine thread prevents the upper board from vibrating and loosening
Curved ceiling: choose 1-1/4″ fine thread + flat head, short nails can prevent penetration of light steel keel, and fine thread adapts to curved installation stress
High humidity area: choose 1-5/8″ fine thread + galvanized coating, the galvanized layer can block water vapor, and the fine thread still maintains high tensile strength in a humid environment
Fine Thread VS Coarse Thread Drywall Screw
| Dimensions | Fine thread screws | Coarse thread screws |
| Applicable boards | High-density gypsum board, cement fiber board, thin metal keel | thin metal keel Conventional density gypsum board, wooden keel |
| Installation speed Requires | higher speed (recommended 1800-2200 RPM power tools) | Suitable for medium and low speeds (1200-1500 RPM) |
| Seismic performance | Thread slip threshold ≥ 7-level vibration | Thread slip threshold ≤ 5-level vibration |
| Cost efficiency | the rework rate is reduced by 50% | easy to loosen and requires secondary reinforcement |
FAQ
It is recommended to use a speed-controlled electric screwdriver (with clutch). Manual installation can easily cause thread dislocation or head depression
It is applicable, but it is recommended to choose a model with TPI≤28. Too dense threads may cut wood fibers and reduce nail holding force.
Detection method: Wipe the screw with a white cloth. If it is obviously black, the phosphate layer is worn and anti-rust paint is required for repair.
Professional Purchase Suggestions
1️⃣ Measure density: Use a vernier caliper to measure the length of 10 threads. The error of high-quality fine threads is ≤0.12mm.
2️⃣ Test hardness: Use a file to lightly scrape the nail rod. Qualified products should have no obvious scratches (quenching meets the standard).
3️⃣ Check certification: The packaging must indicate the ASTM standard code to avoid purchasing unlabeled “special nails for construction site panels”.
