AB Hole Sizes

RECOMMENDED DRILL SIZES

Type AB & B

Self-Tapping Screw Size

Major Thread Diameter

Minor Thread Diameter

For Heavy Metals

For Light Metals

No.
Threads per Inch
Basic screw Diameter
Max.
Min.
Max.
Min.
Drill Size
Drill Size
2
32
.086
.088
.082
.064
.060
49
.0730
49
.0730
4
24
.112
.114
.108
.086
.082
41
.0960
41
.0960
5
20
.125
.130
.123
 
.094
.090
36
.1065
36
.1065
6
20
.138
.139
.132
.104
.099
32
.1160
32
.1160
7
19
.151
.154
.147
.115
.109
30
.1285
30
.1285
8
18
.164
.166
.159
.122
.116
28
.1405
29
.1360
10
16
.190
.189
.182
.141
.135
20
.1610
21
.1590
12
14
.216
.215
.208
.164
.157
13
.1850
14
.1820
1/4
14
.250
.246
.237
.192
.185
3
.2130
4
.2090
5/16
12
.313
.315
.306
.244
.236
I
.2720
H
.2660
3/8
12
.375
.380
.371
.309
.299
R
.3390
Q
.3320

 

Type AB point: A thread forming screw combining locating point of Type A with thread size and pitch of Type B. Normal limitations of type B apply.
Type B point: A thread forming screw for use in heavier metal .050 to .200 thick. Larger root diameter with finer thread pitch for light and heavy sheet metal non-ferrous castings, plastics, impregnated plywood, asbestos combinations, and other materials.

Contact Eagle Fastener

Eagle Fastener Corporation
453 E. Dartmoor Drive
Crystal Lake, IL 60014
Mailing Address: PO Box 1259
Crystal Lake, IL 60039-1259
800 . 323 . 6142 ( t )
815 . 455 . 7177 ( t )
815 . 455 . 7205 ( f )
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