Tiny Tools
Thread Standards Vs. Appropriate drill for the pre-hole
ISO
UN
MSD Drills Ordering Code
DC
M coarse
M ne
UNC
UNF/UNEF
UNS
1.8
M2.2x0.45 M2.2x0.35
2-64UNF
MSD 4 A140 DC18 L9
M2.2x0.2 M2.2x0.25 M2.5x0.35 M2.5x0.25 M2.5x0.35
2.0
M2.5x0.45
3-48UNC
MSD 4 A140 DC20 L10
2.1
3-56UNF
MSD 4 A140 DC21 L10.5
2.2
4-40UNC
MSD 4 A140 DC22 L11
2.3 2.5 2.6 2.7 2.9 3.0
4-48UNF
MSD 4 A140 DC23 L11.5
M3x0.5
5-40UNC
MSD 4 A140 DC25 L12.5
M3x0.35 M3x0.25
5-44UNF
MSD 4 A140 DC26 L13
6-32UNC
MSD 4 A140 DC27 L13.5
M3.5x0.6
6-40UNF
MSD 4 A140 DC29 L14.5
M3.5x0.5 M3.5x0.25 M3.5x0.35 M3.5x0.2
MSD 4 A140 DC30 L15
3.2
MSD 4 A140 DC32 L16
3.3 3.4 3.5
M4x0.7
MSD 4 A140 DC33 L16.5
8-32UNC
MSD 4 A140 DC34 L17
M4x0.5
8-36UNF
MSD 4 A140 DC35 L17.5
M4x0.2 M4.5x0.25 M4x0.35 M4.5x0.5 M4.5x0.35 M4.5x0.2 M4.5x0.25 M4.5x0.35
3.8
M4.5x0.75
10-24UNC
MSD 4 A140 DC38 L19
4.0 4.1
10-32UNF
MSD 5 A140 DC40 L20
10-36UNS
MSD 5 A140 DC41 L20.5
10-40UNS
4.2
M5x0.8
MSD 5 A140 DC42 L21
4.3 4.4 4.5 4.7
M5x0.75
10-48UNS 10-56UNS
MSD 5 A140 DC43 L21.5
12-24UNC
MSD 5 A140 DC44 L22
M5x0.5 M5x0.35
MSD 5 A140 DC45 L22.5
12-32UNEF
MSD 5 A140 DC47 L23.5
M5x0.2 M5x0.25 M5.5x0.75
4.8
12-36UNS
MSD 5 A140 DC48 L24
12-48UNS 12-56UNS
5.0
M6x1.0
M5.5x0.5
MSD 6 A140 DC50 L25
5.1
M5.5x0.35 M5.5x0.25 M5.5x0.35 M6x0.75 M5.5x0.2
1/4-20UNC
MSD 6 A140 DC51 L25.5
5.2
MSD 6 A140 DC52 L26
5.3 5.4 5.5 5.7
1/4-24UNS
MSD 6 A140 DC53 L26.5
1/4-28UNF 1/4-27UNS
MSD 6 A140 DC54 L27
M6x0.5 M6x0.35
MSD 6 A140 DC55 L27.5
1/4-40UNS
MSD 6 A140 DC57 L28.5
38
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