Jobber drills with straight shank DIN 338

Tapping hole diameters
#d1#
ISO metric threads (dim. acc. to DIN 336, 04/97)
thread
drill dia.
mm
thread
drill dia.
mm
thread
drill dia.
mm
M1 0.75 M4.5 3.80 M24 21.00
M1.1 0.85 M5 4.20 M27 24.00
M1.2 0.95 M5.5 4.60 M30 26.50
M1.4 1.10 M6 5.00 M33 29.50
M1.6 1.25 M7 6.00 M36 32.00
M1.7 1.30 M8 6.80 M39 35.00
M1.8 1.40 M9 7.80 M42 37.50
M2 1.60 M10 8.50 M45 40.50
M2.2 1.70 M11 9.50 M48 43.00
M2.3 1.90 M12 10.20 M52 47.00
M2.5 2.00 M14 12.00 M56 50.50
M2.6 2.10 M16 14.00 M60 54.50
M3 2.50 M18 15.50 M64 58.00
M3.5 2.90 M20 17.50 M68 62.00
M4 3.30 M22 19.50 M72 66.00
ISO metric fine threads (dim. acc. to DIN 336, 04/97)
thread
drill dia.
mm
thread
drill dia.
mm
thread
drill dia.
mm
M3 x 0.35 2.6 M11 x 1 10.0 M30 x 1.5 28.5
M3.5 x 0.35 3.1 M12 x 1.5 10.5 M32 x 1.5 30.5
M4 x 0.35 3.6 M14 x 1.5 12.5 M33 x 1.5 31.5
M4 x 0.5 3.5 M16 x 1.5 14.5 M35 x 1.5 33.5
M4.5 x 0.5 4.0 M18 x 1.5 16.5 M36 x 1.5 34.5
M5 x 0.5 4.5 M20 x 1.5 18.5 M38 x 1.5 36.5
M5.5 x 0.5 5.0 M22 x 1.5 20.5 M39 x 1.5 37.5
M6 x 0.75 5.2 M24 x 1.5 22.5 M40 x 1.5 38.5
M7 x 0.75 6.2 M25 x 1.5 23.5 M42 x 1.5 40.5
M8 x 0.75 7.2 M26 x 1.5 24.5 M45 x 1.5 43.5
M9 x 1 8.0 M27 x 1.5 25.5 M48 x 1.5 46.5
M10 x 1 9.0 M28 x 1.5 26.5 M50 x 1.5 48.5
The following guidelines apply for fine metric threads with unusual pitches: tap drill hole = nominal thread size minus pitch.
Values with 0.05 are rounded up to the next 0.1 mm.
BSP-threads (dim. acc. to DIN 336, 04/97)
thread
drill dia.
mm
thread
drill dia.
mm
thread
drill dia.
mm
G1/ 8″ 8.80 G11/ 8″ 35.50 G23/ 4″ 79.00
G1/ 4″ 11.80 G11/ 4″ 39.50 G3″ 85.00
G3/ 8″ 15.25 G13/ 8″ 41.75 G31/ 4″ 91.50
G1/ 2″ 19.00 G11/ 2″ 45.25 G31/ 2″ 98.00
G5/ 8″ 21.00 G13/ 4″ 51.00 G33/ 4″ 104.00
G3/ 4″ 24.50 G2″ 57.00 G4″ 110.50
G7/ 8″ 28.25 G21/ 4″ 63.00
G1 30.75 G21/ 2″ 73.00
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