Longest Drywall Screws
Premium Longest Drywall Screw Manufacturer
Sinsun’s Longest Drywall Screws are extra-long special screws designed for thickened gypsum boards, multi-layer composite structures or special frames (such as adding sound insulation cotton or insulation layer). The length range covers 2.5 inches (63mm) to 6 inches (150mm), which can meet the needs of deep fixing. Made of high-strength low-carbon steel, with galvanized or phosphating surface, it has both corrosion resistance and high load-bearing capacity. It is the best screw for commercial buildings, industrial decoration and heavy partition projects. Sinsun Long Drywall Screws – With three core features of super strong penetration, industrial-grade durability and flexible customization, it redefines the professional-grade fixing standard.
- Industry-leading length, suitable for complex structures
- Double thread design, no need for pre-drilling, saving 40% construction time.
- High-strength low-carbon steel (HRC 55), resistant to bending and breaking, 50% higher than conventional screws.
- Galvanized layer + Dacromet double protection (optional)
- Flexible customization to meet personalized projects and support non-standard customization
Long Drywall Screw Series
Comparison Table Of Different Specifications
| Length | Applicable Scenarios | Recommended coating | Tool requirements |
| 75MM | Double-layer gypsum board, light ceiling | Galvanized Standard | electric screwdriver (PH2) |
| 90MM | Sound insulation cotton composite wall, outdoor advertising board | Dacromet | electric screw gun |
| 100MM | Three-layer fireproof partition, decorative layer | Blackening/epoxy coating | High torque electric drill |
| 120MM | Insulation wall, basement reinforcement | Galvanized | Industrial-grade impact drill |
| 125MM | Highly corrosive environment, medical clean room | Dacromet | Low-speed precision screwdriver |
| 150MM | Ultra-thick industrial wall, heavy-duty guard plat | Dacromet | Hydraulic drive tool |
75mm Drywall Screws
90mm Drywall Screws
100mm Drywall Screws
120mm Drywall Screws
125mm Drywall Screws
150mm Drywall Screws
Longest Drywall Screw
Long Drywall Screws Technical Specifications
| Material | Carbon Steel C1022A |
| Diameter | #6 (3.5mm)/#8(4.2MM)/#10(4.8MM) |
| Length | 3”-6”(750-150MM) |
| Head Type | Bugle Head,Flat Head |
| Thread Type | Fine Threads & Coarse Thread |
| Packing Specifications | 1000 pieces/box |
| Vertical Tension | ≥200kg (4.2mm×75mm galvanized type, the test substrate is pine wood) |
| Surface Coating | Black Phosphate /Zinc Palted /Dacromet |
Long Drywall Screws Size Chart
| Gauge | Size | Diameter | MM |
| #6 | 3″ | 3.5MM | 75MM |
| #6 | 4″ | 3.5MM | 100MM |
| #8 | 3″ | 4.2MM | 75MM |
| #8 | 4″ | 4.2MM | 100MM |
| #8 | 4-3/4″ | 4.2MM | 120MM |
| #8 | 5″ | 4.2MM | 125MM |
| #10 | 4-3/4″ | 4.8MM | 120MM |
| #10 | 5″ | 4.8MM | 125MM |
| #10 | 6” | 4.8MM | 150MM |
Core Features Of Longest Drywall Screw
Super long penetration, suitable for complex structures
Sinsun provides a variety of lengths from 75mm (3″) to 150mm (6″), suitable for different thicknesses of plates
Long screws have strong penetration, ensuring a stable connection of deep frames to avoid delamination or loosening.
High-strength material, anti-bending and anti-fracture
The low-carbon steel material is heat-treated, with a hardness of HRC 50-55, and a 30% increase in bending resistance.
The surface can be optionally galvanized (rust-proof) or phosphated (anti-friction spark) or Dacromet to adapt to a variety of environments.
Optimized design:
Self-Tapping tip
No pre-drilling is required, easily penetrate gypsum board, wood or light steel keel.
Double thread structure (some models): Enhanced bite force and tensile strength to prevent long screws from loosening during vibration. Anti-loosening performance is increased by 70% in a vibrating environment.
Wide compatibility:
Applicable to 25mm-150mm thick gypsum board, wooden frame, light steel keel and composite structure.
Can be used with impact drill, electric screwdriver for high-speed operation, support PH2, drive.
Flexible customization to meet personalized projects
Support non-standard customization: length (accuracy of 1mm), diameter, weight
Applicable Scenarios Of Black Plasterboard Screws
Sinsun’s long drywall screw is a long fastener designed for thick-layer boards, composite structures and special frames.
- Thickened/multi-layer gypsum board: fix double-layer gypsum board, composite wall with sound insulation or insulation layer.
- Heavy frame: connection between steel structure ceiling, metal truss and gypsum board.
- Special projects:
- Theater/recording studio soundproof wall (long screws are required to penetrate the sound insulation layer).
- Basement moisture-proof wall (with rust-proof galvanized layer).
- Commercial space fireproof partition (phosphating treatment to prevent sparks).
- Renovation and reinforcement: repair old walls and replace short screws to enhance structural stability.
Usage Guide
| Scenario Requirements | Recommended Specifications | Advantages |
| Double-layer gypsum board + light steel keel | 4.2mm×63mm galvanized screws + double threads | Anti-rust and tensile resistance, prevent interlayer displacement |
| Soundproof wall (gypsum board + sound insulation cotton) | 4.8mm×100mm black screws + flat head | Deep fixation, head pressure dispersion |
| Outdoor advertising board (metal frame) | 4.2mm×75mm Dacromet coated screws | Super weather resistance, wind and rain corrosion resistance |
| Fireproof partition (commercial building) | 3.5mm×50mm phosphating screws | Anti-friction sparks, in line with fire standards |
Why Choose Sinsun's Long Drywall Screw
Customized Service
Size customization: support non-standard length (such as 90mm drywall screw, 140mm drywall screws) and diameter customization, minimum order quantity 5000 pieces.
Surface Treatment: galvanizing is provided on demand, zinc layer thickness 4-8μm, epoxy coating (color identification) or Dacromet coating (ultra-high corrosion resistance).
Packaging Customization:
Engineering bulk: 1000 pieces/moisture-proof box, with desiccant or with screw bit
Retail portable package: 50-200 pieces/portable snap box (with length identification sticker).
Brand customization: printing company logo and parameter label.
Bulk purchase discount: >10 tons of orders enjoy price discount + exclusive logistics support.
FAQ
Q1: Will overlong screws increase the risk of cracking of gypsum board?
A1: When installed correctly (control the speed and avoid over-tightening), the pressure is evenly distributed by the frame, which can reduce deformation and cracking
Q2:Can long drywall screws be used on concrete substrates?
A2:You need to pre-embed plastic expansion tubes or use special concrete screws. Drywall screws are only suitable for connecting gypsum board to frame.
Q3: How many millimeters can drywall screws be customized at the longest?
A3: Currently, the maximum customization is 200mm (8 inches), and the material heat treatment process needs to be confirmed in advance.
