Cobalt Letter Series Drill
Bits
Cobalt HSS Drills
Letter Sizes
M42CO - Cobalt HSS, Screw Machine Length,
Heavy Duty, 135° Split Point
Made of heat resistant cobalt. Performs well in
limited access areas or where extra rigidity is required. Designed for drilling
high alloy and work hardening materials.
Letter
Diameter
Decimal
Equivalent
Flute
Length, Inch
Overall
Length, Inch
Pkg
Qty
M42CO
EDP #
Price
Pkg.
Purchase
Online
A
0.234
1.9375
2.4375
12
46542301
$102.48
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B
0.238
1.3750
2.5000
12
46542302
$109.20
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C
0.242
1.3750
2.5000
12
46542303
$108.72
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D
0.246
1.3750
2.5000
12
46542304
$109.20
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E
0.250
1.3750
2.5000
12
46542305
$99.36
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F
0.257
1.4375
2.6250
12
46542306
$114.72
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G
0.261
1.4375
2.6250
12
46542307
$115.44
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H
0.266
1.5000
2.6875
12
46542308
$122.16
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I
0.272
1.5000
2.6875
12
46542309
$122.16
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J
0.277
1.5000
2.6875
12
46542310
$122.16
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K
0.281
1.5000
2.6875
12
46542311
$122.16
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L
0.290
1.5625
2.7500
12
46542312
$144.96
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M
0.295
1.5625
2.7500
12
46542313
$144.96
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N
0.302
1.6250
2.8125
12
46542314
$155.76
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O
0.316
1.6875
2.9375
6
46542315
$86.28
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P
0.323
1.6875
2.9375
6
46542316
$86.28
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Q
0.332
1.6875
3.0000
6
46542317
$93.12
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R
0.339
1.6875
3.0000
6
46542318
$93.12
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S
0.348
1.7500
3.0625
6
46542319
$116.04
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T
0.358
1.7500
3.0625
6
46542320
$116.04
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U
0.368
1.8125
3.1250
6
46542321
$116.04
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V
0.377
1.8750
3.2500
6
46542322
$128.64
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W
0.386
1.8750
3.2500
6
46542323
$128.64
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X
0.397
1.9375
3.3125
6
46542324
$128.64
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Y
0.404
1.9375
3.3125
6
46542325
$128.64
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Z
0.413
2.0000
3.3750
6
46542326
$147.60
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