5/16 hole X 4 inch on a flat bottom hole: This will depend on the material, and tools available. Use a 1/8 bit, then 5/16. If you are not sure how deep the drill bit is in the hole, paint white out on the bit as your 4 inch mark so you can see it while the drill is spinning. If the material is metal, you will need coolant. To get the flat bottom: it wood, put a flat ended bolt into the hole and hammer, it will flatten the hole, it metal, forget about it, the hole is quite flat, and a pain in the butt to change. :-)
Two quarters of an inch are in a half inch.
Since it is a hole, it doesn't have any dirt. But it has the capacity to hold 1 cubic inch.
1/2" Or Half Inch of 50% of 1 inch
there are 1\24 of a foot in a half an inchthere are 1\2 of an inch in a half an inch
No, it is way too big for a pilot hole as 5 mm = 0.20 inch which is smaller than .38 inch
12mm is a little smaller and 13mm is a little larger than a 1/2 inch bolt.
The recommended pilot hole size for a 10 screw is 3/16 inch.
The recommended size for a 9 screw pilot hole is 3/16 inch.
The recommended pilot hole size for a 8 screw is 11/64 inch.
The recommended size for a 6 screw pilot hole is 7/64 inch.
A 3/16 inch pilot hole should be drilled for a 1/4 inch lag screw.
A 3/16 inch pilot hole should be drilled for a 10 screw.
A pilot hole of 3/32 inch should be drilled for a 6 screw.
A, the half inch bolt has 13 rows of thread in one inch.
The standard 10 bolt hole size for this application is 3/16 inch.
A 3/16 inch pilot hole drill bit should be used for installing a 1/4 inch screw into hardwood.