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Hardened Steel
System of Measurement
System of Measurement
Inch
Metric
Letter
Wire Gauge
Number of Flutes
Number of Flutes
01
23
45
67
89
1011
Size
Size
default
0.0020"
0.0024"
0.0028"
0.0032"
0.0039"
0.0043"
0.0047"
0.0051"
0.0055"
0.0059"
0.0071"
0.0075"
0.0079"
0.0087"
0.0098"
0.0102"
0.0106"
0.0110"
0.0118"
0.0126"
0.0130"
0.0142"
0.0150"
1/64"
0.0181"
0.0189"
0.0197"
1/32"
3/64"
1/16"
5/64"
3/32"
7/64"
1/8"
9/64"
5/32"
11/64"
3/16"
13/64"
7/32"
15/64"
1/4"
17/64"
9/32"
19/64"
5/16"
21/64"
11/32"
23/64"
3/8"
25/64"
13/32"
27/64"
7/16"
29/64"
15/32"
31/64"
1/2"
33/64"
17/32"
35/64"
9/16"
37/64"
19/32"
39/64"
5/8"
41/64"
21/32"
43/64"
11/16"
45/64"
23/32"
47/64"
3/4"
49/64"
25/32"
51/64"
13/16"
53/64"
27/32"
55/64"
7/8"
57/64"
29/32"
59/64"
15/16"
61/64"
31/32"
63/64"
1"
1 1/32"
1 1/16"
1 1/8"
1 5/32"
1 3/16"
1 1/4"
1 5/16"
1 3/8"
1 7/16"
1 1/2"
1 9/16"
1 3/4"
2"
1.0 mm
1.05 mm
1.1 mm
1.15 mm
1.2 mm
1.25 mm
1.3 mm
1.35 mm
1.4 mm
1.45 mm
1.5mm
1.55 mm
1.6 mm
1.65 mm
1.7 mm
1.75 mm
1.8 mm
1.85 mm
1.9 mm
1.95 mm
2.0 mm
2.05 mm
2.1 mm
2.2 mm
2.3 mm
2.35 mm
2.4 mm
2.5 mm
2.6 mm
2.7 mm
2.8 mm
2.9 mm
3.0 mm
3.1 mm
3.2 mm
3.3 mm
3.4 mm
3.5 mm
3.6 mm
3.7 mm
3.8 mm
3.9 mm
4.0 mm
4.1 mm
4.2 mm
4.3 mm
4.5 mm
4.7 mm
4.8 mm
4.9 mm
5.0 mm
5.1 mm
5.2 mm
5.3 mm
5.4 mm
5.5 mm
5.6 mm
5.7 mm
5.8 mm
5.9 mm
6.0 mm
6.1 mm
6.2 mm
6.3 mm
6.4 mm
6.5 mm
6.6 mm
6.7 mm
6.8 mm
6.9 mm
7.0 mm
7.5 mm
7.7 mm
7.8 mm
7.9 mm
8.0 mm
8.1 mm
8.2 mm
8.3 mm
8.4 mm
8.5 mm
8.6 mm
8.7 mm
8.8 mm
9.0 mm
9.4 mm
9.5 mm
9.6 mm
9.7 mm
10.0 mm
10.2 mm
10.5 mm
10.8 mm
11.0 mm
11.5 mm
11.8 mm
12.0 mm
12.5 mm
13.0 mm
14.0 mm
14.5 mm
15.0 mm
16.0 mm
18.0 mm
19.0 mm
20.0 mm
21.0 mm
22.0 mm
23.0 mm
26.0 mm
29.0 mm
31.0 mm
33.0 mm
35.0 mm
1 ga
2 ga
3 ga
4 ga
5 ga
6 ga
7 ga
8 ga
9 ga
10 ga
11 ga
12 ga
13 ga
14 ga
15 ga
16 ga
17 ga
18 ga
19 ga
20 ga
21 ga
22 ga
23 ga
24 ga
25 ga
26 ga
27 ga
28 ga
29 ga
30 ga
31 ga
32 ga
33 ga
34 ga
35 ga
36 ga
37 ga
38 ga
39 ga
40 ga
41 ga
42 ga
43 ga
44 ga
45 ga
46 ga
47 ga
48 ga
49 ga
50 ga
51 ga
52 ga
53 ga
54 ga
55 ga
56 ga
57 ga
58 ga
59 ga
60 ga
61 ga
62 ga
63 ga
64 ga
65 ga
66 ga
67 ga
68 ga
69 ga
70 ga
71 ga
72 ga
73 ga
74 ga
75 ga
76 ga
77 ga
78 ga
79 ga
80 ga
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Individual/Set
Individual/Set
Individual
Set
Number of Milling Ends
Number of Milling Ends
1
2
Decimal Size Equivalent
Decimal Size Equivalent
0.002"
0.0024"
0.0028"
0.0032"
0.0039"
0.0043"
0.0047"
0.0051"
0.0055"
0.0059"
0.0071"
0.0075"
0.0079"
0.0087"
0.0098"
0.0102"
0.0106"
0.011"
0.0118"
0.0126"
0.013"
0.0135"
0.0142"
0.0145"
0.015"
0.0156"
0.016"
0.018"
0.0181"
0.0189"
0.0197"
0.02"
0.021"
0.0225"
0.024"
0.025"
0.026"
0.028"
0.0292"
0.031"
0.0313"
0.032"
0.033"
0.035"
0.036"
0.037"
0.038"
0.039"
0.0394"
0.04"
0.041"
0.0413"
0.042"
0.043"
0.0433"
0.0453"
0.0465"
0.0469"
0.0472"
0.0492"
0.0512"
0.052"
0.0531"
0.055"
0.0551"
0.0571"
0.0591"
0.0595"
0.061"
0.0625"
0.063"
0.0635"
0.065"
0.0669"
0.067"
0.0689"
0.07"
0.0709"
0.0728"
0.073"
0.0748"
0.076"
0.0768"
0.0781"
0.0785"
0.0787"
0.0807"
0.081"
0.082"
0.0827"
0.086"
0.0866"
0.089"
0.0906"
0.0925"
0.0935"
0.0938"
0.0945"
0.096"
0.098"
0.0984"
0.0995"
0.1015"
0.1024"
0.104"
0.1063"
0.1065"
0.1094"
0.11"
0.1102"
0.111"
0.113"
0.1142"
0.116"
0.1181"
0.12"
0.122"
0.125"
0.126"
0.1285"
0.1299"
0.13"
0.1339"
0.136"
0.1378"
0.1405"
0.1406"
0.1417"
0.144"
0.1457"
0.147"
0.1495"
0.1496"
0.152"
0.1535"
0.154"
0.1563"
0.157"
0.1575"
0.159"
0.161"
0.1614"
0.1654"
0.166"
0.1693"
0.1695"
0.1719"
0.173"
0.177"
0.1772"
0.18"
0.182"
0.185"
0.1875"
0.189"
0.191"
0.1929"
0.1935"
0.196"
0.1968"
0.1969"
0.199"
0.2008"
0.201"
0.2031"
0.204"
0.2047"
0.2055"
0.2087"
0.209"
0.2126"
0.213"
0.2165"
0.2188"
0.2205"
0.221"
0.2244"
0.228"
0.2283"
0.2323"
0.234"
0.2344"
0.2362"
0.238"
0.2402"
0.242"
0.2441"
0.246"
0.248"
0.25"
0.252"
0.2559"
0.257"
0.2598"
0.261"
0.2638"
0.2656"
0.266"
0.2677"
0.2717"
0.272"
0.2756"
0.277"
0.281"
0.2813"
0.29"
0.295"
0.2953"
0.2969"
0.302"
0.3032"
0.3071"
0.311"
0.3125"
0.315"
0.316"
0.3189"
0.3223"
0.323"
0.3268"
0.3281"
0.3307"
0.332"
0.3346"
0.3386"
0.339"
0.3425"
0.3438"
0.3465"
0.348"
0.3543"
0.358"
0.3594"
0.368"
0.3701"
0.374"
0.375"
0.377"
0.378"
0.3819"
0.386"
0.3906"
0.3937"
0.397"
0.4016"
0.404"
0.4063"
0.413"
0.4134"
0.4219"
0.4252"
0.4331"
0.4375"
0.4528"
0.4531"
0.4646"
0.4688"
0.4724"
0.4844"
0.4921"
0.5"
0.5118"
0.5156"
0.5313"
0.5469"
0.5512"
0.5625"
0.5709"
0.5781"
0.5905"
0.5938"
0.6094"
0.625"
0.6299"
0.6406"
0.6563"
0.6719"
0.6875"
0.7031"
0.7087"
0.7188"
0.7344"
0.748"
0.75"
0.7656"
0.7813"
0.7874"
0.7969"
0.8125"
0.8268"
0.8281"
0.8438"
0.8594"
0.8661"
0.875"
0.8906"
0.9055"
0.9063"
0.9219"
0.9375"
0.9531"
0.9688"
0.9844"
1"
1.0236"
1.0313"
1.0625"
1.125"
1.1417"
1.1563"
1.1875"
1.2205"
1.25"
1.2992"
1.3125"
1.375"
1.378"
1.4375"
1.5"
1.5625"
1.75"
2"
End Mill Type
End Mill Type
Center Cutting
Noncenter Cutting
Countersink Angle
Countersink Angle
default
60°
82°
90°
100°
110°
120°
Flute Spacing
Flute Spacing
Equal
Variable