Size 8 1 8 inches.
Pilot hole size sheet metal screws.
However there are times when sheet metal screws are required.
To counterbore for striking head.
No of auger bit.
The best way to drill an accurate pilot hole is to have the right hole size.
The pilot hole should be well fitted to the screw or the nail so that it would not wobble when inserted.
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.
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.
A size 4 screw should have a pilot hole drill size of 3 32 inches.
Your pilot hole drill bit size will depend on the size of your sheet metal screw.
Twist bit nearest size in fractions of an inch.
It is recommended that you should spend ample time to read and understand the drill bit guide.
Drill gauge no to be used for.
Size 14 1 4 inches 3 16 inches.
Shop for wood screws.
This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.
To achieve this the right bit size should be used.
To help my readers out i thought i would add this quick reference chart.
Average rockwell b 55 75.
Aluminum sheet and bar including aluminum andzinc die castings and all alloys in rockwell b hardnessrange from 40 70 and other ductile materials of similar hardness such as brass bronze etc note special materials and applications may warrant special hole sizes.
And 5 16 inches 1 4 inches.
Pilot hole sizes for metal screws and wood screws posted 30 january 2010 at 9 43pm by michael chu filed under.
Size 12 5 32 inches.
Lo driv tri round recommended pilot holes sizes metric screws.
Twist bit nearest size in fractions of an inch.
Size 10 9 64 inches.
Size 6 7 64 inches.
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.
Types ab b self tapping screws in mild steel brass aluminium alloy stainless steel and monel sheet metal.
Bit or drill sizes.