Page 76 - Michigan Drill

Threaded Shank

Adapter Drills

High Speed Steel & Cobalt NAS 965
HOLE MAKING Stub Series
1/4-28 Threaded Shank – 135° Split Point
National Aerospace Standard (NAS965).
Generally used in portable angle drilling tools, or offset drills and allow access
to space-restricted areas. Threading provides a secure fit in the tool holder.

List No. 602 – High Speed Steel
List No. 602C – Cobalt
Price Each
Price Each
Size Decimal Flute Overall H.S. Cobalt Size Decimal Flute Overall H.S. Cobalt
Equivalent Length Length* 602 602C Equivalent Length Length* 602 602C
58 .0420 1/4 1/2 5.62 — 3/16 .1875 5/16 9/16 5.74 6.72
57 .0430 5/16 1/2 5.62 — 12 .1890 5/16 9/16 5.80 6.78
54 .0550 5/16 1/2 5.62 — 11 .1910 5/16 9/16 5.86 6.84
53 .0595 5/16 1/2 5.62 — 10 .1935 5/16 9/16 5.86 6.84
50 .0700 5/16 1/2 5.62 6.23 9 .1960 5/16 5/8 5.95 —
40 .0980 5/16 1/2 4.52 5.50 7 .2010 5/16 5/8 — 6.96
1/8 .1250 5/16 1/2 4.64 5.62 6 .2040 5/16 5/8 5.98 6.96
30 .1285 5/16 9/16 4.76 5.74 5 .2055 5/16 5/8 5.98 6.96
29 .1360 5/16 9/16 4.82 5.80 3 .2130 5/16 5/8 6.04 7.02
28 .1405 5/16 9/16 4.82 5.80 7/32 .2188 5/16 5/8 6.11 7.08
27 .1440 5/16 9/16 4.88 5.86 15/64 .2344 5/16 5/8 — 7.69
5/32 .1562 5/16 9/16 4.88 5.86 1/4 .2500 5/16 5/8 6.72 7.94
21 .1590 5/16 9/16 4.88 5.86 6.40mm .2520 5/16 5/8 6.96 —
20 .1610 5/16 9/16 4.88 5.86 F .2570 5/16 5/8 7.02 8.31
19 .1660 5/16 9/16 4.88 5.86 17/64 .2656 5/16 5/8 7.60 —
18 .1690 5/16 9/16 4.88 — 9/32 .2812 5/16 5/8 7.94 10.01
17 .1730 5/16 9/16 5.25 — 5/16 .3125 5/16 5/8 12.20 —
16 .1770 5/16 9/16 5.50 6.47 21/64 .3281 5/16 5/8 13.74 18.32
13 .1850 5/16 9/16 5.62 6.59 11/32 .3438 5/16 5/8 15.27 18.56
* O.A.L. Not including threads
Short Series
List No. 603 – High Speed Steel
List No. 603C – Cobalt Price Each Price Each
Decimal Flute Overall H.S. Cobalt Decimal Flute Overall H.S. Cobalt
Size Size
Equivalent Length Length* 603 603C Equivalent Length Length* 603 603C
60 .0400 9/16 1 5.62 — 17 .1730 9/16 1-1/4 5.56 6.72
1/16 .0625 9/16 1 5.62 — 16 .1770 9/16 1-1/4 5.62 6.78
52 .0635 9/16 1 5.62 — 15 .1800 9/16 1-1/4 5.92 —
50 .0700 9/16 1 5.62 6.11 4.60mm .1811 9/16 1-1/4 6.00 —
5/64 .0781 9/16 1 5.62 — 14 .1820 9/16 1-1/4 5.92 —
42 .0935 9/16 1 5.62 — 13 .1850 9/16 1-1/4 5.92 6.84
3/32 .0938 9/16 1 5.62 — 3/16 .1875 9/16 1-1/4 5.98 7.14
41 .0960 9/16 1 5.13 — 12 .1890 9/16 1-1/4 6.11 7.14
40 .0980 9/16 1 4.52 5.50 11 .1910 9/16 1-1/4 6.11 7.14
39 .0995 9/16 1 4.58 — 10 .1935 9/16 1-1/4 6.11 7.14
38 .1015 9/16 1 4.58 5.56 9 .1960 9/16 1-1/4 6.23 7.33
36 .1065 9/16 1 4.58 5.56 8 .1990 9/16 1-1/4 6.29 7.39
7/64 .1094 9/16 1 4.58 — 6 .2040 9/16 1-1/4 6.35 7.45
35 .1100 9/16 1 4.58 — 5 .2055 9/16 1-1/4 6.41 7.51
33 .1130 9/16 1 4.64 — 7/32 .2188 9/16 1-1/4 6.53 7.76
32 .1160 9/16 1 4.64 — 2 .2210 9/16 1-1/4 6.72 7.81
31 .1200 9/16 1 4.64 — 1 .2280 9/16 1-1/4 6.72 7.81
1/8 .1250 9/16 1 4.64 5.62 15/64 .2344 9/16 1-1/4 6.96 8.43
30 .1285 9/16 1-1/4 4.76 5.74 B .2380 9/16 1-1/4 7.33 8.79
29 .1360 9/16 1-1/4 4.82 5.80 C .2420 9/16 1-1/4 7.45 —
28 .1405 9/16 1-1/4 4.82 5.80 D .2460 9/16 1-1/4 7.45 9.65
9/64 .1406 9/16 1-1/4 4.82 5.80 1/4 .2500 9/16 1-1/4 7.57 9.65
27 .1440 9/16 1-1/4 4.88 5.86 F .2570 9/16 1-1/4 7.94 9.77
26 .1470 9/16 1-1/4 4.88 5.86 G .2610 9/16 1-1/4 8.55 9.89
24 .1520 9/16 1-1/4 4.88 — H .2660 9/16 1-1/4 8.55 9.89
5/32 .1562 9/16 1-1/4 4.88 5.86 J .2770 9/16 1-1/4 9.16 —
22 .1570 9/16 1-1/4 4.88 5.86 9/32 .2812 9/16 1-1/4 9.16 10.99
21 .1590 9/16 1-1/4 4.88 5.86 5/16 .3125 9/16 1-1/4 — 18.00
20 .1610 9/16 1-1/4 4.88 5.86 O .3160 9/16 1-1/4 17.09 —
19 .1660 9/16 1-1/4 5.01 5.98 21/64 .3281 9/16 1-1/4 14.89 19.54
18 .1695 9/16 1-1/4 5.50 — 11/32 .3438 9/16 1-1/4 15.99 19.66
11/64 .1719 9/16 1-1/4 5.50 6.59 3/8 .3750 9/16 1-1/4 16.12 20.15
* O.A.L. Not including threads
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