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Drill Bits

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This page lists our range of quality drill bits.

The range is specifically designed to cover the tapping drill sizes and clearance hole sizes for the range of taps list.
The use of the correct drill size is crucial to successful tapping and tap life and some of the sizes below are difficult to obtain on the high street.

The tap drill sizes quoted as standard ('Std') are the tap manufacturers recommended size for full thread engagement.
For many hobby and non-critical applications, a larger size tap drill can be used to give less thread engagement
but reduced the risk of tap breakage - this may be preferable when tapping the smaller size threads, particularly if you are new to thread tapping.
These drills are listed as Increased clearance ('Inc Clearance') and will result in approximately 65% thread engagement

Please note that though we try to keep the data below up to date, lengths of drill bits occasionally vary.
If the length is critical, please e mail us for confirmation.

 If the size you need isn't listed please e mail us with your requirements.

For more details of tap diameters and other thread data, click here

All prices include 20% VAT  Click here for details

 HSS Drill Bits
Dia (mm) Length (mm)

Usage

MF Ref Price Each  
           
0.5 34

Pilot drill

MF-DB-005 £2.46

           
1.0 34

Pilot drill

MF-DB-010 £1.74

           
1.05 34

Tap drill for 12BA

MF-DB-105 £3.06

           
1.1 34

Pilot drill

MF-DB-011 £1.80

           
1.2 38

Pilot drill

MF-DB-012 £1.80

           
1.3 38

Pilot drill

MF-DB-013 £1.74

           
1.4 38

Tap drill for 10BA

MF-DB-014 £1.56

           
1.5 40

Pilot drill

MF-DB-015 £1.32

         
1.6 43

Std Tap drill for M2

MF-DB-016 £1.32

           
1.7 46

Inc Clearance Tap drill for M2

MF-DB-017 £1.56

           
1.8 46

Std Tap drill for 8BA

MF-DB-018 £1.50

Std Tap drill for 2UNC

           
2.0 49

Clearance drill for M1.6 and 10BA

MF-DB-020 £1.20

           
2.05 49

Std Tap Drill for M2.5

MF-DB-205 £1.62

           
2.1 49

Close clearance for M2

MF-DB-021 £1.44

           
2.2 49

Inc Clearance Tap drill for M2.5

MF-DB-022 £1.44

           
2.3 49

Std Tap Drill for 6BA

MF-DB-023 £1.44

 Std Tap Drill for No 4 UNC

         
2.4 49

Std Tap Drill for No 4 UNF

MF-DB-024 £1.44

           
2.5 57

Clearance drill for M2 & 8BA

MF-DB-025 £1.20

Std Tap Drill for M3

           
2.55 57

Std Tap Drill for No 1/8" BSW

MF-DB-255 £1.44

           
2.6 57

Close clearance for M2.5

MF-DB-026 £1.44

           
2.65 57

Inc Clearance Tap drill for M3

MF-DB-265 £2.22

Std Tap Drill for No 5 UNC

Std Tap Drill for No 5 BA

           
2.8 61

Std Tap Drill for No 6 UNC

MF-DB-028 £1.44

           
2.9 61

Std Tap Drill for M3.5

MF-DB-029 £1.26

           
3.0 61

Clearance drill for M2.5

MF-DB-030 £1.20

Std Tap Drill for 4BA

Std Tap Drill for 6UNF

         
3.2 61

Std Tap Drill for 5/32" BSW

MF-DB-032 £1.20

           
3.3 65

Clearance drill for 6BA

MF-DB-033 £1.32

Std Tap Drill for M4

           
3.4 65

Std Tap Drill for 3BA

MF-DB-034 £1.62

           
3.5 70

Clearance drill for M3.0

MF-DB-035 £1.32

Inc Clearance Tap Drill for M4

Std Tap drill for 8 UNF & 8UNC

           
3.7 70

Std Tap Drill for 3/16" BSW

MF-DB-037 £1.44

           
3.8 70   MF-DB-038 £1.74

           
3.9 70

Std Tap Drill for No 10 UNC

MF-DB-039 £1.74

           
4.0 75

Clearance drill for M3.5 & 4BA

MF-DB-040 £1.50

Std Tap Drill for 2BA

Std Tap Drill for 3/16 BSF

         
4.1 75

Tap Drill for 10 UNF

MF-DB-041 £1.56

           
4.2 75

Std Tap Drill for M5

MF-DB-042 £1.56

           
4.5 80

Clearance drill for M4

MF-DB-045 £1.68

Inc Clearance Tap Drill for M5

Std Tap Drill for 12UNC

Std Tap Drill for 1 BA

           
5.0 86

Std Tap Drill for M6

MF-DB-050 £1.92

           
5.1 86

Std Tap Drill for 1/4" UNC

MF-DB-051 £2.34

Std Tap Drill for 1/4" BSW

           
5.25 86

Std Tap Drill for M6 x0.75 fine

MF-DB-525 £3.78

           
5.3 86

Inc Clearance Tap Drill for M6

MF-DB-053 £2.52

Std Tap Drill for 1/4" BSF

           
5.5 93

Clearance drill for M5 & 2BA

MF-DB-055 £2.58

Tap drill for Glow Plug (1/4"x32)

Tap drill for 1/4" UNF

         
5.8 101

5.8mm drill bit

MF-DB-058 £2.88

           
6.0 101

6mm drill bit

MF-DB-060 £2.46

           
6.5 101

Clearance drill for M6

MF-DB-065 £2.76

           
6.6 101

Tap drill for 5/16" UNC

MF-DB-066 £3.54

           
6.8 101

Tap drill for 5/16" BSF & M8x1.25 (coarse pitch)

MF-DB-068 £3.00

           
6.9 101

Tap drill for 5/16" UNF

MF-DB-069 £3.54

 

This page was last modified on : May 10, 2022

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