2007-04-16 03:13:33 · 10 answers · asked by Anonymous in Home & Garden ➔ Do It Yourself (DIY)
a 3/8" pilot hole for soft woods.
a 7/16 pilot hole for hard woods.
2007-04-16 03:18:40 · answer #1 · answered by sic-n-tired 3 · 3⤊ 0⤋
Lag Bolt Pilot Hole
2016-12-29 10:46:39 · answer #2 · answered by wernecke 3 · 0⤊ 0⤋
This Site Might Help You.
RE:
What size drill bit should i use for a pilot hole for a 1/2 " lag screw?
2015-08-10 23:47:01 · answer #3 · answered by Dosi 1 · 0⤊ 0⤋
You didn't say how much weight the screw will be holding but the largest bit you should use would be the same size or smaller than the main shank of the screw. Probably 3/8" since the threads are probably 1/8" more than the shank. This would give you full bite and prevent splitting of the material you are screwing into.
2007-04-16 03:22:17 · answer #4 · answered by sensible_man 7 · 2⤊ 0⤋
3/8
2007-04-16 07:30:17 · answer #5 · answered by shermisme 3 · 1⤊ 0⤋
a way to call a bit size is to place the drill bit ontop of the screw and see if the drill bit is just wide enough to cover the screw's shaft and not cover any of the screw's thread.
ps 3/8
2007-04-16 06:35:01 · answer #6 · answered by Anonymous · 3⤊ 0⤋
I like to use 3/8:" pilot using an electric impact driver, easier than using socket wrench.....
2007-04-16 19:17:31 · answer #7 · answered by adevilchild38 5 · 0⤊ 0⤋
A size smaller to give the lag holding power.
2007-04-16 03:23:41 · answer #8 · answered by Anonymous · 0⤊ 2⤋
Lag screws are no designed to need a pilot. If you do use one, smaller than the screw that you are using.
2007-04-16 03:40:30 · answer #9 · answered by Do What 2 · 0⤊ 5⤋
A 1/4 inch would do, a 3/16 inch if you have it.
2007-04-16 03:21:17 · answer #10 · answered by Thomas S 6 · 0⤊ 7⤋