Reference Guide
Metal Drilling
800.866.5740
METAL DRILLING
151
Extra Length Drill Bits
12" Aircraft Extension HSS Fractional
Straight Shank Drill Bits with
135˚ Split Point (Series 621/612)
Size
Decimal
Equiv.
Flute
Length
Overall
Length
Carded
Item #
Bulk
Item #
1/16"
.0625
7/8"
12"
62104ZR
61204
3/32"
.0938
1-1/4"
12"
—
61206
1/8"
.1250
1-5/8"
12"
62108
61208
5/32"
.1563
2"
12"
—
61210
3/16"
.1875
2-5/16"
12"
62112ZR
61212
7/32"
.2188
2-1/2"
12"
—
61214
1/4"
.2500
2-3/4"
12"
62116
61216
9/32"
.2813
2-15/16"
12"
—
61218
5/16"
.3125
3-3/16"
12"
62120
61220
11/32"
.3438
3-7/16"
12"
—
61222
3/8"
.3750
3-5/8"
12"
62124
61224
13/32"
.4063
3-7/8"
12"
—
61226
7/16"
.4375
4-1/16"
12"
62128
61228
15/32"
.4688
4-5/16"
12"
—
61230
1/2"
.5000
4-1/2"
12"
62132
61232ZR
• 135° split-point tip starts drilling immediately and
eliminates “walking.”
• Engineered with premium high speed steel with black
oxide coating for corrosion resistance.
• Ideal for applications requiring an extended reach. Not
recommended for deep drilling applications.
• Straight shank
• 135° split-point tip starts drilling immediately and
eliminates “walking.”
• Engineered with premium high speed steel with black
oxide coating for corrosion resistance.
• Ideal for applications requiring an extended reach. Not
recommended for deep drilling applications.
• Straight shank
61224
6" Aircraft Extension HSS Fractional Straight
Shank Drill Bits with
135˚ Split Point (Series 667/666)
Size
Decimal
Equiv.
Flute
Length
Overall
Length
Carded
Item #
Bulk
Item #
1/16"
.0625
7/8"
6"
66704ZR
66604ZR
5/64"
.0781
1"
6"
—
66605
3/32"
.0938
1-1/4"
6"
—
66606
7/64"
.1094
1-1/2"
6"
—
66607
1/8"
.1250
1-5/8"
6"
66708
66608
9/64"
.1406
1-3/4"
6"
—
66609
5/32"
.1563
2"
6"
66710
66610
11/64"
.1719
2-1/8"
6"
—
66611
3/16"
.1875
2-5/16"
6"
66712
66612
13/64"
.2031
2-7/16"
6"
—
66613
7/32"
.2188
2-1/2"
6"
66714
66614
15/64"
.2344
2-5/8"
6"
—
66615
1/4"
.2500
2-3/4"
6"
66716
66616
17/64"
.2656
2-7/8"
6"
—
66617ZR
9/32"
.2813
2-15/16"
6"
—
66618
19/64"
.2969
3-1/16"
6"
—
66619
5/16"
.3125
3-3/16"
6"
66720ZR
66620
21/64"
.3281
3-5/16"
6"
—
66621
11/32"
.3438
3-7/16"
6"
—
66622
23/64"
.3594
3-1/2"
6"
—
66623
3/8"
.3750
3-5/8"
6"
66724
66624
25/64"
.3906
3-3/4"
6"
—
66625
13/32"
.4063
3-7/8"
6"
—
66626
27/64"
4219
3-15/16"
6"
—
66627
7/16"
.4375
4-1/16"
6"
66728
66628
15/32"
.4688
4-5/16"
6"
—
66630
1/2"
.5000
4-1/2"
6"
66732
66632
66624