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12 pc. 31/64 In. x 5-7/8 In. Cobalt Drill Bit
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CO4158
Bosch cobalt drill bits are specially designed for drilling in hard steel. Thick web helix delivers fast material removal combined with increased durability for maximum efficiency and performance. Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating, eliminating the need for a center punch.
Benefits
Withstands high-temperature applications for extended periods of time (up to 1,100°F)
Available in jobber length, full shank
Rigid, thick web design adds stability to bit in tough applications
Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium
Surface hardened to penetrate tough abrasive materials
Technical Data
| *Note | 1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger |
| Bulk | false |
| Diameter | 31/64" |
| Flute Length | 3.839 |
| Length | 5.875" |
| Overall Length | 5.875 |
| Quantity | 6 (bulk) |
| Shank Diameter | 0.4843 |
CO4158
CO4158
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CO2131
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CO2132
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CO2133
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CO2134
CO2135
CO2136
CO2137
CO2138
CO2140
CO2142
CO2144
CO2145
CO2146
CO2147
CO2148
CO2149
CO2150
CO2151
CO2152
CO2153
CO2154
CO2155
CO2157
CO2158
CO2159
CO4128
CO4130
CO4131
CO4132
CO4133
CO4134
CO4135
CO4136
CO4137
CO4138
CO4140
CO4141
CO4142
CO4143
CO4144
CO4145
CO4146
CO4147
CO4148
CO4149
CO4150
CO4152
CO4154
CO4155
CO4156
CO4157
CO4159
Other sizes
CO2131
Diameter
1/16"
Overall Length
1.875
Shank Diameter
0.0625
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2132
Diameter
5/64"
Overall Length
2
Shank Diameter
0.0781
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2133
Diameter
3/32"
Overall Length
2.25
Shank Diameter
0.0937
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2134
Diameter
7/64"
Overall Length
2.625
Shank Diameter
0.109298
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2135
Diameter
1/8"
Overall Length
2.75
Shank Diameter
0.125
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2136
Diameter
9/64"
Overall Length
2.875
Shank Diameter
0.1406
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2137
Diameter
5/32"
Overall Length
3.125
Shank Diameter
0.15625
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2138
Diameter
11/64"
Overall Length
3.25
Shank Diameter
0.1718
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2140
Diameter
13/64"
Overall Length
3.625
Shank Diameter
0.2031
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2142
Diameter
15/64"
Overall Length
3.875
Shank Diameter
0.2343
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2149
Diameter
11/32"
Overall Length
4.75
Shank Diameter
0.3437
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2150
Diameter
23/64"
Overall Length
4.875
Shank Diameter
0.3593
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2151
Diameter
3/8"
Overall Length
5
Shank Diameter
0.375
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2152
Diameter
25/64"
Overall Length
5.125
Shank Diameter
0.3906
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2153
Diameter
13/32"
Overall Length
5.25
Shank Diameter
0.4062
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2154
Diameter
27/64"
Overall Length
5.375
Shank Diameter
0.4218
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2155
Diameter
7/16"
Overall Length
5.5
Shank Diameter
0.4375
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2157
Diameter
15/32"
Overall Length
5.75
Shank Diameter
0.4687
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2158
Diameter
31/64"
Overall Length
5.875
Shank Diameter
0.4843
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2159
Diameter
1/2"
Overall Length
6
Shank Diameter
0.5
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4128
Diameter
1/64"
Overall Length
0.75
Shank Diameter
0.0156
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4130
Diameter
3/64"
Overall Length
1.75
Shank Diameter
0.0468
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4131
Diameter
1/16"
Overall Length
1.875
Shank Diameter
0.0625
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4132
Diameter
5/64"
Overall Length
2
Shank Diameter
0.0781
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4133
Diameter
3/32"
Overall Length
2.25
Shank Diameter
0.0937
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4134
Diameter
7/64"
Overall Length
2.625
Shank Diameter
0.109298
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4135
Diameter
1/8"
Overall Length
2.75
Shank Diameter
0.125
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4136
Diameter
9/64"
Overall Length
2.875
Shank Diameter
0.1406
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4137
Diameter
5/32"
Overall Length
3.125
Shank Diameter
0.15625
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4138
Diameter
11/64"
Overall Length
3.25
Shank Diameter
0.1718
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4140
Diameter
13/64"
Overall Length
3.365
Shank Diameter
0.2031
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4141
Diameter
7/32"
Overall Length
3.75
Shank Diameter
0.2187
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4142
Diameter
15/64"
Overall Length
3.875
Shank Diameter
0.2343
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4143
Diameter
1/4"
Overall Length
4
Shank Diameter
0.25
Quantity
12 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2144
Diameter
17/64"
Overall Length
4.125
Shank Diameter
0.2656
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2145
Diameter
9/32"
Overall Length
4.25
Shank Diameter
0.2812
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2146
Diameter
19/64"
Overall Length
4.375
Shank Diameter
0.2968
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2147
Diameter
5/16"
Overall Length
4.5
Shank Diameter
0.3125
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO2148
Diameter
21/64"
Overall Length
4.625
Shank Diameter
0.3281
Quantity
1 (carded)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4145
Diameter
9/32"
Overall Length
4.25
Shank Diameter
0.2812
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4146
Diameter
19/64"
Overall Length
4.375
Shank Diameter
0.2968
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4147
Diameter
5/16"
Overall Length
4.5
Shank Diameter
0.3125
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4148
Diameter
21/64"
Overall Length
4.625
Shank Diameter
0.3281
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4149
Diameter
11/32"
Overall Length
4.75
Shank Diameter
0.3437
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4150
Diameter
23/64"
Overall Length
4.875
Shank Diameter
0.3593
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4152
Diameter
25/64"
Overall Length
5.125
Shank Diameter
0.3906
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4154
Diameter
27/64"
Overall Length
5.375
Shank Diameter
0.4218
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4155
Diameter
7/16"
Overall Length
5.5
Shank Diameter
0.4375
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4156
Diameter
29/64"
Overall Length
5.625
Shank Diameter
0.4531
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4157
Diameter
15/32"
Overall Length
5.75
Shank Diameter
0.4687
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4159
Diameter
1/2"
Overall Length
6
Shank Diameter
0.5
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger
CO4144
Diameter
17/64"
Overall Length
4.125
Shank Diameter
0.2656
Quantity
6 (bulk)
*Note
1/64” – 7/64”: 118° point; 1/8” and larger; 135° point; three flat shank 3/16” and larger