|
DECIMAL
INCH / METRIC EQUIVALENTS
(PLUS TAP / DRILL / PILOT RECOMMENDATIONS)
|
USS
& SAE
TAP SIZES |
DRILL |
INCH EQ.
|
METRIC
EQ. |
ALL TAP, DRILL
& PILOT SIZES
|
| |
#80 |
.0135" |
.3429
mm |
|
| |
#79 |
.0145" |
.3683
mm |
|
|
1/64" |
.015625" |
.3969
mm |
#0
Pilot in Soft-Wood |
| |
#78 |
.016" |
.4064
mm |
|
| |
#77 |
.018" |
.4572
mm |
|
| |
|
.0197" |
.5000
mm |
|
| |
#76 |
.02" |
.5080
mm |
|
| |
#75 |
.021" |
.5334
mm |
|
| |
#74 |
.0225" |
.5715
mm |
|
| |
#73 |
.024" |
.6096
mm |
|
| |
#72 |
.025" |
.6350
mm |
|
| |
#71 |
.026" |
.6604
mm |
|
| |
#70 |
.028" |
.7112
mm |
|
| |
#69 |
.0292" |
.7416
mm |
|
| |
|
.0295" |
.7500
mm |
M1x.25
coarse |
| |
#68 |
.031" |
.7874
mm |
|
|
1/32" |
.03125" |
.7938
mm |
#0 Pilot, Hard-Wood
#1
Pilot, Hard & Soft-Wood
#2 Pilot, Soft-Wood |
| |
#67 |
.032" |
.8128
mm |
|
| |
#66 |
.033" |
.8382
mm |
|
| |
|
.0335" |
.8500
mm |
M1.1x.25
coarse |
| |
#65 |
.035" |
.8890
mm |
|
| |
#64 |
.036" |
.9144
mm |
|
| |
#63 |
.037" |
.9398
mm |
|
| |
|
.0374" |
.9500
mm |
M1.2x.25
coarse |
| |
#62 |
.038" |
.9652
mm |
|
| |
#61 |
.039" |
.9906
mm |
|
| |
|
.0394" |
1.0000
mm |
|
| |
#60 |
.04" |
1.0160
mm |
|
| |
#59 |
.041" |
1.0414
mm |
|
| |
#58 |
.042" |
1.0668
mm |
|
| |
#57 |
.043" |
1.0922
mm |
|
| |
|
.0433" |
1.1000
mm |
M1.4x.3
coarse |
| |
#56 |
.0465" |
1.1811
mm |
|
| #0-80 UNF |
3/64" |
.046875" |
1.1906
mm |
#0-80 UNF
#2 Pilot,
Hard-wood
#3 Pilot, Soft-Wood
#4 Pilot, Soft-Wood |
| |
|
.0492" |
1.2500
mm |
M1.6x.35
coarse |
| |
|
.0512" |
1.3000
mm |
M1.7x.35
coarse |
| |
#55 |
.052" |
1.3208
mm |
|
| |
#54 |
.055" |
1.3970
mm |
|
| |
|
.0571" |
1.4500
mm |
M1.8x.35
coarse |
| |
|
.0591" |
1.5000
mm |
|
#1-64
UNC
#1-72 UNF |
#53 |
.0595" |
1.5113
mm |
#1-64
UNC #1-72 UNF |
|
1/16" |
.0625" |
1.5875
mm |
#0 Wood
Shank Hole
#3
Pilot, Hard-Wood
#4 Pilot, Hard-wood
#5 Pilot, Soft-wood
#6 Pilot,
Soft-wood
#7 Pilot, Soft-wood |
| |
|
.063" |
1.6000
mm |
M2x.4
coarse |
| |
#52 |
.0635" |
1.6129
mm |
|
| |
#51 |
.067" |
1.7018
mm |
|
| |
|
.0689" |
1.7500
mm |
M2.2x.45
coarse |
#2-64
UNF
#2-56 UNC |
#50 |
.07" |
1.7780
mm |
#2-64
UNF #2-56 UNC |
| |
#49 |
.073" |
1.8542
mm |
|
| |
#48 |
.076" |
1.9304
mm |
|
|
5/64" |
.078125" |
1.9844
mm |
#1 Wood Shank Hole
#5
Pilot, Hard-wood
#6 Pilot, Hard-wood
#8 Pilot, Soft-wood
#9 Pilot,
Soft-wood |
| #3-48
UNC |
#47 |
.0785" |
1.9939
mm |
#3-48
UNC |
| |
|
.0787" |
2.0000
mm |
|
| |
|
.0807" |
2.0500
mm |
M2.5x.45
coarse |
| |
#46 |
.081" |
2.0574
mm |
|
| #3-56
UNF |
#45 |
.082" |
2.0828
mm |
#3-56
UNF |
| |
#44 |
.086" |
2.1844
mm |
|
| #4-40
UNC |
#43 |
.089" |
2.2606
mm |
#4-40
UNC |
| #4-48
UNF |
#42 |
.0935" |
2.3749
mm |
#4-48
UNF |
|
3/32" |
.09375" |
2.3813
mm |
#2 Wood Shank Hole
#7
Pilot, Hard-wood
#8 Pilot, Hard-wood
#10 Pilot, Soft-wood
#11
Pilot, Soft-wood |
| |
#41 |
.096" |
2.4384
mm |
|
| |
#40 |
.098" |
2.4892
mm |
|
| |
|
.0984" |
2.5000
mm |
M3x.5
coarse |
| |
#39 |
.0995" |
2.5273
mm |
|
| #5-40
UNC |
#38 |
.1015" |
2.5781
mm |
#5-40
UNC |
| #5-44
UNF |
#37 |
.104" |
2.6416
mm |
#5-44
UNF |
| #6-32
UNC |
#36 |
.1065" |
2.7051
mm |
#6-32
UNC |
|
7/64" |
.109375" |
2.7781
mm |
#3 Wood Shank Hole
#4
Wood Shank Hole
#9 Pilot, Hard-wood
#10 Pilot, Hard-wood
#12
Pilot, Soft-wood
#14 Pilot, Soft-wood |
| |
#35 |
.11" |
2.7940
mm |
|
| |
#34 |
.111" |
2.8194
mm |
|
| #6-40
UNF |
#33 |
.113" |
2.8702
mm |
#6-40
UNF |
| |
|
.1142" |
2.9000
mm |
M3.5x.6
coarse |
| |
#32 |
.116" |
2.9464
mm |
|
| |
|
.1181" |
3.0000
mm |
|
| |
#31 |
.12" |
3.0480
mm |
|
|
1/8" |
.125" |
3.1750
mm |
#5 Wood Shank Hole
#11
Pilot, Hard-wood
#12 Pilot, Hard-wood |
| |
#30 |
.1285" |
3.2639
mm |
|
| |
|
.1299" |
3.3000
mm |
M4x.7
coarse |
#8-32
UNC
#8-36 UNF |
#29 |
.136" |
3.4544
mm |
#8-32
UNC #8-36 UNF |
| |
|
.1378" |
3.5000
mm |
M4x.5
Fine |
| |
#28 |
.1405" |
3.5687
mm |
|
|
9/64" |
.140625" |
3.5719
mm |
#6 Wood Shank Hole
#14
Pilot, Hard-wood
#16 Pilot, Soft-wood
#18 Pilot, Soft-wood |
| |
|
.1417" |
3.6000
mm |
M4x.35
Fine |
| |
#27 |
.144" |
3.6576
mm |
|
| |
|
.1457" |
3.7000
mm |
M4.5x.75
coarse |
| |
#26 |
.147" |
3.7338
mm |
|
| #10-24
UNC |
#25 |
.1495" |
3.7973
mm |
#10-24
UNC |
| |
#24 |
.152" |
3.8608
mm |
|
| |
#23 |
.154" |
3.9116
mm |
|
|
5/32" |
.15625" |
3.9688
mm |
#7 Wood Shank Hole
#16
Pilot, Hard-wood |
| |
#22 |
.157" |
3.9878
mm |
|
| |
|
.1575" |
4.0000
mm |
|
| #10-32
UNF |
#21 |
.159" |
4.0386
mm |
#10-32
UNF |
| |
#20 |
.161" |
4.0894
mm |
|
| |
|
.1654" |
4.2000
mm |
M5x.8
coarse |
| |
#19 |
.166" |
4.2164
mm |
|
| |
#18 |
.1695" |
4.3053
mm |
|
|
11/64" |
.171875" |
4.3656
mm |
#8 Wood Shank Hole
#20
Pilot, Soft-wood |
| #12-24
UNC |
#17 |
.173" |
4.3942
mm |
#12-24
UNC |
| |
#16 |
.177" |
4.4958
mm |
|
| |
|
.1772" |
4.5000
mm |
M5x.5
Fine |
| #12-28
UNF |
#15 |
.18" |
4.5720
mm |
#12-28
UNF |
| |
#14 |
.182" |
4.6228
mm |
|
| |
#13 |
.185" |
4.6990
mm |
|
|
3/16" |
.1875" |
4.7625
mm |
#9 Wood Shank Hole
#10
Wood Shank Hole
#18 Pilot, Hard-wood |
| |
#12 |
.189" |
4.8006
mm |
|
| |
#11 |
.191" |
4.8514
mm |
|
| |
#10 |
.1935" |
4.9149
mm |
|
| |
#
9 |
.196" |
4.9784
mm |
|
| |
|
.1969" |
5.0000
mm |
M6x1
coarse |
| |
#
8 |
.199" |
5.0546
mm |
|
| ¼"-20
UNC |
#
7 |
.201" |
5.1054
mm |
¼"-20
UNC |
|
13/64" |
.203125" |
5.1594
mm |
#11 Wood Shank Hole
#20 Pilot, Hard-wood |
| |
#
6 |
.204" |
5.1816
mm |
|
| |
#
5 |
.2055" |
5.2197
mm |
|
| |
|
.2067" |
5.2500
mm |
M6x.75
Fine |
| |
#
4 |
.209" |
5.3086
mm |
|
| ¼"-28
UNF |
#
3 |
.213" |
5.4102
mm |
¼"-28
UNF |
| |
|
.2165" |
5.5000
mm |
M6x.5
Fine |
|
7/32" |
.21875" |
5.5563
mm |
#12 Wood Shank Hole |
| |
#
2 |
.221" |
5.6134
mm |
|
| |
#
1 |
.228" |
5.7912
mm |
|
| |
A |
.234" |
5.9436
mm |
|
|
15/64" |
.234375" |
5.9531
mm |
|
| |
|
.2362" |
6.0000
mm |
M7x1
coarse |
| |
B |
.238" |
6.0452
mm |
|
| |
C |
.242" |
6.1468
mm |
|
| |
D |
.246" |
6.2484
mm |
1/16"-27
NPT |
| |
|
.2461" |
6.2500
mm |
M7x.75
Fine |
|
1/4" |
.25" |
6.3500
mm |
#14 Wood Shank Hole |
| |
E |
.25" |
6.3500
mm |
|
| |
|
.2559" |
6.5000
mm |
|
| 5/16"-18
UNC |
F |
.257" |
6.5278
mm |
5/16"-18
UNC |
| |
G |
.261" |
6.6294
mm |
|
|
17/64" |
.265625" |
6.7469
mm |
#16 Wood Shank Hole |
| |
H |
.266" |
6.7564
mm |
|
| |
|
.2677" |
6.8000
mm |
M8x1.25
coarse |
| 5/16"-24
UNF |
I |
.272" |
6.9088
mm |
5/16"-24
UNF |
| |
|
.2756" |
7.0000
mm |
M8x.5
Fine |
| |
J |
.277" |
7.0358
mm |
|
| |
K |
.281" |
7.1374
mm |
|
|
9/32" |
.28125" |
7.1438
mm |
|
| |
|
.2854" |
7.2500
mm |
M8x.75
Fine |
| |
L |
.29" |
7.3660
mm |
|
| |
M |
.295" |
7.4930
mm |
|
| |
|
.2953" |
7.5000
mm |
M8x1
Fine |
|
19/64" |
.296875" |
7.5406
mm |
#18 Wood Shank Hole |
| |
N |
.302" |
7.6708
mm |
|
| |
|
.3071" |
7.8000
mm |
M9x1.25
coarse |
| 3/8"-16 UNC |
5/16" |
.3125" |
7.9375
mm |
3/8"-16 UNC |
| |
|
.315" |
8.0000
mm |
M9x1
Fine |
| |
O |
.316" |
8.0264
mm |
|
| |
P |
.323" |
8.2042
mm |
|
|
21/64" |
.328125" |
8.3344
mm |
#20 Wood Shank Hole |
| 3/8"-24
UNF |
Q |
.332" |
8.4328
mm |
3/8"-24
UNF |
| |
|
.3346" |
8.5000
mm |
M10x1.5
coarse |
| |
R |
.339" |
8.6106
mm |
1/8"-27
NPT |
|
11/32" |
.34375" |
8.7313
mm |
|
| |
|
.3465" |
8.8000
mm |
M10x1.25
Fine |
| |
S |
.348" |
8.8392
mm |
|
| |
|
.3543" |
9.0000
mm |
M10x1
Fine |
| |
T |
.358" |
9.0932
mm |
7/16"-14
UNC |
|
23/64" |
.359375" |
9.1281
mm |
|
| |
|
.3642" |
9.2500
mm |
M10x.75
Fine |
| |
U |
.368" |
9.3472
mm |
|
| |
|
.374" |
9.5000
mm |
M11x1.5
coarse |
|
3/8" |
.375" |
9.5250
mm |
|
| |
V |
.377" |
9.5758
mm |
|
| |
W |
.386" |
9.8044
mm |
|
| 7/16"-20 UNF |
25/64" |
.390625" |
9.9219
mm |
7/16"-20 UNF |
| |
|
.3937" |
10.0000
mm |
M11x1
Fine |
| |
X |
.397" |
10.0838
mm |
|
| |
|
.4016" |
10.2000
mm |
M12x1.75
coarse |
| |
Y |
.404" |
10.2616
mm |
|
|
13/32" |
.40625" |
10.3188
mm |
|
| |
Z |
.413" |
10.4902
mm |
|
| |
|
.4134" |
10.5000
mm |
M12x1.5
Fine |
| ½"-13 UNC |
| |
