Your pilot hole drill bit size will depend on the size of your sheet metal screw.
Pilot hole size sheet metal screws.
Size 6 7 64 inches.
Drill gauge no to be used for.
Twist bit nearest size in fractions of an inch.
Shop for wood screws.
Low carbon sheet and bar.
And 5 16 inches 1 4 inches.
No of auger bit.
This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.
Drill gauge no or letter to be used for maximum holding power.
It is important that the correct hole size is used and the recommendation below should be followed but if very hard material is being used a hole size slightly larger may have to be used and in very soft material a smaller hole.
Pilot hole sizes for metal screws and wood screws posted 30 january 2010 at 9 43pm by michael chu filed under.
The pilot hole should be well fitted to the screw or the nail so that it would not wobble when inserted.
To help my readers out i thought i would add this quick reference chart.
Size 10 9 64 inches.
Types ab b self tapping screws in mild steel brass aluminium alloy stainless steel and monel sheet metal.
The problem was i didn t know how big to drill the holes and when the holes were too small it was quite difficult to.
Twist bit nearest size in fractions of an inch.
The best way to drill an accurate pilot hole is to have the right hole size.
Lo driv tri round recommended pilot holes sizes metric screws.
For shank clearance holes.
Life while installing shelving in my home i had to drill pilot holes for 8 and 12 metal screws into studs.
To counterbore for striking head.
Size 12 5 32 inches.
It is recommended that you should spend ample time to read and understand the drill bit guide.
However there are times when sheet metal screws are required.
Bit or drill sizes.
There is nothing more aggravating when you just don t know what size drill bit to use for a pilot.
Size 14 1 4 inches 3 16 inches.
A size 4 screw should have a pilot hole drill size of 3 32 inches.
To achieve this the right bit size should be used.