Standard Thread Size |
Cut Tap Drill Size |
Roll Tap
Drilll Size |
Metric Thread Size |
Cut Tap Drill Size |
Roll Tap
Drill Size |
|---|---|---|---|---|---|
-..- |
|||||
(0.060) 0-80 |
3/64 (0.0469) |
#54 (0.055) |
M1.6 X 0.35 |
1.25mm |
1.45mm |
(0.073) 1-64 |
#53 (0.0595) |
1.65mm (0.0649) |
M1.8 X 0.35 |
1.45mm |
1/16 (0.0625) |
(0.073) 1-72 |
#53 (0.0595) |
#51 (0.067) |
M2 X 0.4 |
1.60mm |
#49 (0.073) |
(0.086) 2-56 |
#50 (0.070) |
#47 (0.0785) |
M2.2 X 0.45 |
1.75mm |
#42 (0.0935) |
(0.086) 2-64 |
#50 (0.070) |
#47 (0.0787) |
M2.5 X 0.45 |
2.05mm |
#42 (0.0935) |
(0.099) 3-48 |
#47 (0.0785) |
#43 (0.089) |
M3 X 0.5 |
2.9mm |
#34 (0.111) |
(0.099) 3-56 |
#46 (0.081) |
#42 (0.0935) |
M3.5 X 0.6 |
3.3mm |
3.3mm |
(0.112) 4-40 |
#43 (0.089) |
#38 (0.1015) |
M4 X 0.7 |
3.75mm |
3.7mm |
(0.112) 4-48 |
#42 (0.0935) |
#37 (0.104) |
M4.5 X 0.75 |
#19 (0.166) |
4.2mm |
(0.125) 5-40 |
#39 (0.0995) |
#33 (0.113) |
M5 X 0.8 |
5mm |
#13 (0.185) |
(0.125) 5-44 |
#38 (0.1015) |
#32 (0.116) |
M6 X 1.0 |
6mm |
#2 (0.221) |
(0.138) 6-32 |
#36 (0.1065) |
1/8 (0.125) |
M7 X 1.0 |
#H (0.266) |
6.5mm |
(0.138) 6-40 |
#33 (0.113) |
3.2mm (0.1259) |
M8 X 1.25 |
#J (0.277) |
#M (0.295) |
(0.164) 8-32 |
#29 (0.136) |
#25 (0.1495) |
M8 X 1.0 |
8.5mm |
19/64 (0.2969) |
(0.164) 8-36 |
#29 (0.136) |
#24 (0.152) |
M10 X 1.5 |
8.75mm |
#U (0.368) |
(0.190) 10-24 |
#25 (0.1495) |
11/64 (0.1719) |
M10 X 1.25 |
13/32 (0.4062) |
9.5mm |
(0.190) 10-32 |
#21 (0.159) |
#16 (0.177) |
M12 X 1.75 |
10.75mm |
7/16 (0.4375) |
(0.216) 12-24 |
#17 (0.173) |
5mm (0.1969) |
M12 X 1.25 |
12mm |
11.5mm |
(0.216) 12-28 |
#15 (0.180) |
#8 (0.199) |
M14 X 2.0 |
12.5mm |
33/64 (0.5156) |
(0.250) 1/4-20 |
#7 (0.201) |
#1 (0.228) |
M14 X 1.5 |
14mm |
17/32 (0.5312) |
(0.250) 1/4-28 |
#3 (0.213) |
#A (0.234) |
M16 X 2.0 |
14.5mm |
19/32 (0.5938) |
(0.3125) 5/16-18 |
#F (0.257) |
#L (0.290) |
M16 X 1.5 |
15.5mm |
39/64 (0.6094) |
(0.3125) 5/16-24 |
#I (0.272) |
#M (0.295) |
M18 X 2.5 |
16.5mm |
17mm |
(0.375) 3/8-16 |
5/16 (0.3125) |
#S (0.348) |
M18 X 1.5 |
17.5mm |
11/16 (0.6875) |
(0.375) 3/8-24 |
#Q (0.332) |
#T (0.358) |
M20 X 2.5 |
18.5mm |
18.75mm |
(0.4375) 7/16-14 |
#U (0.368) |
13/32 (0.4062) |
M20 X 1.5 |
19.5mm |
49/64 (0.7656) |
(0.4375) 7/16-20 |
#W (0.386) |
#Z (0.413) |
M22 X 2.5 |
20.5mm |
21mm |
(0.500) 1/2-13 |
27/64 (0.4219) |
15/32 (0.4688) |
M22 X 1.5 |
53/64 |
27/32 (0.8438) |
(0.500) 1/2-20 |
29/64 (0.4531) |
12mm (0.4724) |
M24 X 3.0 |
22mm |
57/64 (0.8906) |
(0.5625) 9/16-12 |
31/64 (0.4844) |
17/32 (0.5312) |
M24 X 2.0 |
24mm |
|
(0.5625) 9/16-18 |
33/64 (0.5156) |
17/32 (0.5312) |
M27 X 3.0 |
63/64 |
|
(0.625) 5/8-11 |
17/32 (0.5312) |
14.75mm (0.5807) |
M27 X 2.0 |
1-3.64 |
|
(0.625) 5/8-18 |
37/64 (0.5781) |
15.25mm (0.6004) |
M30 X 3.5 |
1-7/64 |
|
(0.750) 3/4-10 |
21/32 (0.6562) |
45/64 (0.7031) |
M30 X 2.0 |
1-7/64 |
|
(0.750) 3/4-16 |
11/16 (0.6875) |
23/32 (0.7188) |
M33 X 3.5 |
1-11/64 |
|
(0.875) 7/8-9 |
49/64 (0.7656) |
M33 X 2.0 |
31mm |
||
(0.875) 7/8-14 |
13/16 (0.8125) |
M36 X 4.0 |
32mm |
||
(1.000) 1-8 |
7/8 (0.875) |
M36 X 3.0 |
33mm |
||
(1.000) 1-12 |
59/64 (0.9219) |
M39 X 4.0 |
35mm |
||
(1.000) 1-14 |
15/16 (0.9375) |
M39 X 3.0 |
36mm |
||
-..-
|
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Pipe Tap Drill Sizes |
|||||
Tap Size |
NPT Tap Drill |
NPTF Tap Drill |
NPS Tap Drill |
NPSF Tap Drill |
|
1/16 |
#D (0.246) |
#C (0.242) |
1/4 (0.250) |
#D (0.246) |
|
1/8 |
#R (0.339) |
#Q (0.332) |
#S (0.348) |
#R (0.339) |
|
1/4 |
7/16 (0.4375) |
7/16 (0.4375) |
29/64 0.9062) |
7/16 (0.4375) |
|
3/8 |
37/64 (0.578) |
9/16 (0.5625) |
19/32 (0.5937) |
37/64 (0.578) |
|
1/2 |
23/32 (0.7187) |
45/64 (0.7031) |
47/64 (0.7343) |
45/64 (0.7031) |
|
3/4 |
59/64 (0.92187) |
29/32 (0.9062) |
15/16 (0.9375) |
59/64 (0.9218) |
|
1 |
1-5/32 (1.1562) |
1-9/64 (1.1406) |
1-3/16 (1.1875) |
1-5/32 (1.1562) |
|
1-1/4 |
1-1/2 (1.500) |
1-31/64 (1.4843) |
1-33/64 (1.5156) |
||
1-1/2 |
1-47/64 (1.734) |
1-23/32 (1.7187) |
1-3/4 (1.750) |
||
2 |
2-7/32 (2.2187) |
2-3/16 (2.1875) |
2-7/32 (2.2187) |
||
2-1/ |
2-5/8 (2.625) |
2-3/64 (2.6094) |
2-21/32 (2.6562) |
||
3 |
3-1/4 (3.250) |
3-15/64 (3.2343) |
|||
-..- |
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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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