Double-thread concrete screws are a type of fastener used in construction projects to securely attach materials to concrete surfaces. These screws have a unique design with two threads that help provide increased holding power and stability.
| Size | Drill Bit | Fixture Thickness |
| 3/16*1-1/4″ | 5/32*3-1/2″ | 0-1/4″ |
| 1/4*1-1/4″ | 3/16*3-1/2″ | 0-1/4″ |
| 3/16*1-3/4″ | 5/32*3-1/2″ | 1/4-3/4″ |
| 1/4*1-3/4″ | 3/16*3-1/2″ | 1/4-3/4″ |
| 3/16*2-1/4″ | 5/32*4-1/2″ | 3/4″-1-1/4″ |
| 1/4*2-1/4″ | 3/16*4-1/2″ | 3/4″-1-1/4″ |
| 3/16*2-3/4″ | 5/32*4-1/2″ | 1-1/4″-1-3/4″ |
| 1/4*2-3/4″ | 3/16″*4-1/2″ | 1-1/4″-1-3/4″ |
| 3/16*3-1/4″ | 5/32*5-1/2″ | 1-3/4″-2-1/4″ |
| 1/4*3-1/4″ | 3/16*5-1/2″ | 1-3/4″-2-1/4″ |
| 3/16*3-3/4″ | 5/32*5-1/2″ | 2-1/4″-2-3/4″ |
| 1/4*3-3/4″ | 3/16*5-1/2″ | 2-1/4″-2-3/4″ |
| 3/16*4″ | 5/32*5-1/2″ | 2-1/2″-3″ |
| 1/4*4″ | 3/16*5-1/2″ | 2-1/2″-3″ |
Specification:
Payment Terms: T/T
Packaging & Shipping
