Using 12 point sockets to turn squares on kit tools
INCH KITS
 

INSERT

DRILL

C.BORE

TAP

SIZE

DRILL 
SIZE

MIN.
DIA

MIN.
DEPTH

MAJOR 
DIA.

4-40
#31
.120
.170
.055
.147
6-32
#26
.147
.218
.070
.182
8-32
#17
.173
.241
.065
.208
10-24
13/64
.203
.288
.075
.247
10-32
13/64
.203
.274
.075
.234
12-24
#1
.228
.307
.075
.265
1/4-20
17/64
.265
.352
.075
.319
1/4-28
G
.261
.340
.075
.300
5/16-18
21/64
.328
.430
.085
.388
5/16-24
P
.323
.419
.080
.368
3/8-16
X
.397
.495
.085
.460
3/8-24
W
.386
.473
.080
.432
7/16-14
29/64
.453
.571
.110
.534
7/16-20
29/64
.453
.547
.085
.506
1/2-13
33/64
.515
.648
.110
.604
1/2-20
33/64
.515
.610
.085
.569
9/16-12
19/32
.593
.711
.130
.675
9/16-18
37/64
.578
.668
.110
.638
5/8-11
21/32
.656
.787
.135
.748
5/8-18
41/64
.640
.740
.110
.701
3/4-10
25/32
.781
.953
.135
.885
3/4-16
49/64
.765
.870
.110
.835
.