Nominal Thread Size |
Countersink Dia. - 120 Deg |
Suggested Drill Size |
|||
|---|---|---|---|---|---|
Minimum |
Maximum |
Aluminum |
Steel, Plastic |
||
Unified Coarse Threads |
Cut Tap |
Roll Tap |
Cut Tap |
||
(0.086) 2-56 |
0.090 |
0.110 |
3/32 (0.0938) |
#38 (0.1015) |
#41 (0.096) |
(0.099) 3-48 |
0.110 |
0.140 |
#43 (0.089) |
7/64 (0.1094) |
|
(0.112) 4-40 |
0.140 |
0.170 |
#31 (0.120) |
3.3mm (0.1299) |
#31 (0.120) |
(0.125) 5-40 |
0.160 |
0.190 |
3.4mm (0.1339) |
#29 (0.136) |
|
(0.138) 6-32 |
0.180 |
0.210 |
#25 (0.1495) |
4.1mm (0.1614) |
#25 (0.1495) |
(0.164) 8-32 |
0.200 |
0.230 |
#17 (0.173) |
#12 (0.189) |
#16 (0.177) |
(0.190) 10-24 |
0.240 |
0.270 |
13/64 (0.2031) |
5.7mm (0.2244) |
#5 (0.2055) |
(0.216) 12-24 |
0.260 |
0.290 |
#1 (0.228) |
#1 (0.228) |
|
(0.250) 1/4-02 |
0.310 |
0.340 |
#H (0.266) |
#L (0.290) |
#H (0.266) |
(0.3125) 5/16-18 |
0.380 |
0.410 |
#Q (0.332) |
#Q (0.332) |
|
(0.375) 3/8-16 |
0.450 |
0.480 |
#X (0.397) |
#X (0.397) |
|
(0.4375) 7/16-14 |
0.520 |
0.550 |
29/64 (0.4531) |
29/64 (0.4531) |
|
(0.500) 1/2-13 |
0.590 |
0.620 |
33/64 (0.5156) |
17/32 (0.5312) |
|
(0.5625) 9/16-12 |
0.660 |
0.690 |
37/64 (0.5781) |
19/32 (0.5938) |
|
(0.625) 5/8-11 |
0.730 |
0.760 |
21/32 (0.6562) |
21/32 (0.6562) |
|
(0.750) 3/4-10 |
0.870 |
0.900 |
25/32 (0.7812) |
25/32 (0.7812) |
|
(0.875) 7/8-9 |
1.000 |
1.030 |
29/32 (0.9062) |
29/32 (0.906) |
|
(1.000) 1-7 |
1.140 |
1.170 |
1-1/32 (1.0312) |
1-1/32 (1.0312) |
|
(1.125) 1-1/8-7 |
1.290 |
1.320 |
1-11/64 (1.1719) |
1-11/64 (1.1719) |
|
(1.250) 1-1/4-7 |
1.410 |
1.440 |
1-19/64 (1.2969) |
1-19/64 (1.2969) |
|
(1.375) 1-3/8-6 |
1.560 |
1.590 |
1-27/64 (1.4219) |
1-27/64 (1.4219) |
|
(1.500) 1-1/2-6 |
1.690 |
1.720 |
1-35/64 (1.5469) |
1-35/64 (1.5469) |
|
Unified Fine Threads
|
|||||
(0.099) 3-56 |
0.110 |
0.140 |
#37 (0.104) |
#36 (0.1065) |
|
(0.112) 4-48 |
0.140 |
0.170 |
3mm (01181) |
#31 (0.120) |
|
(0.138) 6-40 |
0.170 |
0.200 |
#26 (0.147) |
#25 (0.1495) |
|
(0.164) 8-36 |
0.200 |
0.230 |
#17 (0.173) |
#16 (0.177) |
|
(0.190) 10-32 |
0.230 |
0.260 |
#7 (.0201) |
5.5mm (0.2165) |
13/64 (0.2031) |
(0.250) 1/4-28 |
0.290 |
0.320 |
#G (0.261) |
6.7mm (0.2638) |
|
(0.3125) 5/16-24 |
0.360 |
0.390 |
21/64 (0.3281) |
21/64 (0.3281) |
|
(0.375) 3/8-24 |
0.420 |
0.450 |
25/64 (0.3906) |
25/64 (0.3906) |
|
(0.4375) 7/16-20
|
0.500 |
0.530 |
(29/64 (0.4531) |
29/64 (0.4531) |
|
(0.500) 1/2-20
|
0.560 |
0.590 |
33/64 (0.5156) |
33/64 (0.5156) |
|
(0.5625) 9/16-18 |
0.630 |
0.660 |
37/64 (0.5781) |
37/64 (0.5781) |
|
(0.625) 5/8-18 |
0.690 |
0.720 |
41/64 (0.6406) |
41/64 (0.6406) |
|
(0.750) 3/4-16 |
0.820 |
0.850 |
49/64 (0.7656) |
49/64 (0.7656) |
|
(0.875) 7/8-14 |
0.960 |
0.990 |
57/64 (0.8906) |
57/64 (0.8906) |
|
(1.000) 1-14 |
1.080 |
1.110 |
1-1/64 (1.0156) |
1-1/32 (1.0312) |
|
(1.000) 1-12 |
1.100 |
1.130 |
1-1/64 (1.0156) |
1-1/32 (1.0312) |
|
(1.125) 1-1/8-12 |
1.220 |
1.2250 |
1-9/64 (1.1406) |
1-5/32 (1.156) |
|
(1.250) 1-1/4-12 |
1.350 |
1.380 |
1-17/64 (1.2656) |
1-9/32 (1.2812) |
|
(1.375) 1-3/8-12 |
1.470 |
1.500 |
1-25/64 (1.3906) |
1-13/32 (1.4062) |
|
(1.500) 1-1/2-12 |
1.600 |
1.630 |
1-33/64 (1.5156) |
1-17/32 (1.5312) |
|
Metric Threads
|
|||||
(0.0787) M2 X 0.4 |
#43 (0.089) |
||||
(0.0984) M2.5 X 0.45 |
#34 (0.111) |
||||
(0.1181) M3 X 0.5 |
#43 (0.089) |
3.4mm (0.1339) |
#44 (0.086) |
||
(0.1377) M3.5 X 0.6 |
#26 (0.167) |
#22 (0.157) |
#26 (0.167) |
||
(0.1575) M4 X 0.7 |
#19 (0.166) |
#15 (0.180) |
#19 (0.166) |
||
(0.1968) M5 X 0.8 |
#6 (0.204) |
#2 (0.221) |
#4 (0.209) |
||
(0.2362) M6 X 1.0 |
#D (0.246) |
#H (0.266) |
#E (0.250) |
||
(0.3149) M8 X 1.25 |
21/64 (0.3281) |
9mm (0.3543) |
#Q (0.332) |
||
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All sizes and information are for reference only. Check with the manufacturer of any hardware to verify any and all information.
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