Q: Do I need to pre-drill before using these?
No, these Robertson lo-root self-drilling screws use a Type 17 tip and nibs under the head that cut their own pilot hole, so pre-drilling and countersinking aren't necessary.
01Z3408 - Lo-Root Self-Drilling Screws, #8 x 1" Flat Head (100)
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Robertson is famous for the patent of the socket-head screw, widely known today as the square recess. The Robertson system perfectly mates the taper drive bit tip to the square recess punched in the screw. The result is a very precise fit: no cam-out, no slippage in the drive. The drive style manufactured today is known as Recex – a combination of Phillips and Robertson drives, allowing convenient use of either drive type. Often considered the woodworker’s screw of choice, Robertson screws are commonly used by furniture manufacturers, cabinetmakers and tradespeople.
These screws have a notched Type 17 self-drilling tip and nibs under the head to eliminate the need for pre-drilling and countersinking. Hardened and lubricated, they are ideal for softwood and some hardwoods, such as oak, elm and maple. Available in flat head only.
Packages of 100.
No, these Robertson lo-root self-drilling screws use a Type 17 tip and nibs under the head that cut their own pilot hole, so pre-drilling and countersinking aren't necessary.
They're suited to softwood and to some hardwoods, including oak, elm and maple, thanks to their hardened, lubricated construction.
The drive is a Recex pattern, a combination of Robertson and Phillips, so a driver bit engages the square recess precisely without the cam-out or slipping that regular drives can suffer, making it the more secure choice for repeated driving.
They range from 1" up to 2 1/2" in a #8 gauge, so you can match the length to your material thickness.
Each package contains 100 screws, an economical quantity for a full project.
| Materials | Steel |
| Dimensions | #8 gauge; lengths of 1", 1 1/4", 1 1/2", 1 3/4", 2" or 2 1/2" |
| Includes | Wood screws |
| Package Quantity | Pack of 100 |
| Warranty | Lee Valley Satisfaction Guarantee |
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Robertson Lo-Root Self-Drilling Screws
Robertson is famous for the patent of the socket-head screw, widely known today as the square recess. The Robertson system perfectly mates the taper drive bit tip to the square recess punched in the screw. The result is a very precise fit: no cam-out, no slippage in the drive. The drive style manufactured today is known as Recex – a combination of Phillips and Robertson drives, allowing convenient use of either drive type. Often considered the woodworker’s screw of choice, Robertson screws are commonly used by furniture manufacturers, cabinetmakers and tradespeople.
These screws have a notched Type 17 self-drilling tip and nibs under the head to eliminate the need for pre-drilling and countersinking. Hardened and lubricated, they are ideal for softwood and some hardwoods, such as oak, elm and maple. Available in flat head only.
Packages of 100.
Choose an option to view item availability.
Choose an option to view item availability.
