EN

BaerCoil® Drill Sizes

M - Metric Coarse Thread

 Drill Size mm
M 2 x 0.42.1
M 2.2 x 0.452.3
M 2.5 x 0.452.6
M 3 x 0.53.2
M 3.5 x 0.63.7
M 4 x 0.74.2
M 5 x 0.85.3
M 6 x 0.756.2
M 6 x 1.06.3
M 7 x 1.07.3
M 8 x 0.758.2
M 8 x 1.08.3
M 8 x 1.258.3
M 9 x 1.09.3
M 9 x 1.259.3
M 10 x 1.010.3
M 10 x 1.2510.3
M 10 x 1.510.4
M 11 x 1.011.3
M 11 x 1.2511.3
M 11 x 1.511.4
M 12 x 1.012.3
M 12 x 1.2512.3
M 12 x 1.512.4
 Drill Size mm
M 12 x 1.7512.4
M 13 x 1.2513.4
M 13 x 1.513.4
M 13 x 1.7513.4
M 14 x 1.014.4
M 14 x 1.2514.4
M 14 x 1.514.5
M 14 x 2.014.5
M 15 x 1.515.5
M 15 x 2.015.5
M 16 x 1.516.5
M 16 x 2.016.5
M 18 x 1.518.5
M 18 x 2.018.5
M 18 x 2.518.5
M 20 x 1.520.5
M 20 x 2.020.5
M 20 x 2.520.5
M 22 x 1.522.5
M 22 x 2.022.5
M 22 x 2.522.5
M 24 x 1.524.5
M 24 x 2.024.5
M 24 x 3.024.5
 Drill Size mm
M 26 x 1.526.5
M 27 x 1.527.5
M 27 x 2.027.5
M 27 x 3.027.5
M 28 x 1.528.5
M 30 x 1.530.5
M 30 x 2.030.5
M 30 x 3.030.5
M 30 x 3.530.5
M 33 x 2.033.5
M 33 x 3.533.5
M 36 x 1.536.5
M 36 x 2.036.5
M 36 x 3.036.5
M 36 x 4.036.5
M 39 x 2.039.5
M 39 x 3.039.5
M 39 x 4.039.5
M 42 x 2.042.5
M 42 x 3.042.8
M 42 x 4.043.0
M 42 x 4.543.0

UNC - Unified Coarse Thread

 Drill Size mm
UNC 2 x 562.30
UNC 3 x 482.60
UNC 4 x 403.00
UNC 5 x 403.40
UNC 6 x 323.70
UNC 8 x 324.40
UNC 10 x 245.10
UNC 12 x 245.70
 Drill Size mm
UNC 1/4 x 206.70
UNC 5/16 x 188.30
UNC 3/8 x 169.90
UNC 7/16 x 1411.60
UNC 1/2 x 1313.00
UNC 9/16 x 1214.80
UNC 5/8 x 1116.50
UNC 11/16x1118.50
 Drill Size mm
UNC 3/4 x 1019.75
UNC 7/8 x 923.00
UNC 1“ x 826.25
UNC 1.1/8 x 729.5
UNC 1.1/4 x 733.0
UNC 1.3/8 x 636.0
UNC 1.1/2 x 639.0

UNF - Unified Fine Thread

 Drill Size mm
UNF 3 x 562.6
UNF 4 x 483.0
UNF 6 x 403.7
UNF 8 x 364.4
UNF 10 x 325.1
UNF 1/4 x 286.6
UNF 5/16 x 248.2
 Drill Size mm
UNF 3/8 x 249.8
UNF 7/16 x 2011.5
UNF 1/2 x 2013.0
UNF 9/16 x 1814.8
UNF 5/8 x 1816.3
UNF 3/4 x 1619.5
UNF 7/8 x 1422.8
 Drill Size mm
UNF 1“ x 1226.0
UNF 1“ x 1426.0
UNF 1.1/8 x 1229.0
UNF 1.1/4 x 1232.5
UNF 1.3/8 x 1235.5
UNF 1.1/2 x 1238.5

G (BSP) - British Pipe Thread

 Drill Size mm
G 1/8 x 2810.0
G 1/4 x 1913.5
G 3/8 x 1917.0
G 1/2 x 1421.5
 Drill Size mm
G 5/8 x 1423.5
G 3/4 x 1427.0
G 7/8 x 1430.5
G 1“ x 1133.5
 Drill Size mm
G 1.1/4 x 1142.5
G 1.1/2 x 1148.5

BSW - British Coarse Thread

 Drill Size mm
BSW 1/8 x 403.40
BSW 3/16 x 245.10
BSW 1/4 x 206.70
BSW 5/16 x 188.30
BSW 3/8 x 169.90
BSW 7/16 x 1411.60
 Drill Size mm
BSW 1/2 x 1213.00
BSW 9/16 x 1214.80
BSW 5/8 x 1116.70
BSW 11/16x1118.50
BSW 3/4 x1020.00
BSW 7/8 x 923.00
 Drill Size mm
BSW 1“ x 826.50
BSW 1.1/8 x 729.50
BSW 1.1/4 x 733.00
BSW 1.3/8 x 636.00
BSW 1.1/2 x 639.00

BSF - British Fine Thread

 Drill Size mm
BSF 3/16 x 325.0
BSF 7/32 x 285.8
BSF 1/4 x 266.6
BSF 9/32 x 267.3
BSF 5/16 x 228.3
BSF 3/8 x 209.9
BSF 7/16 x 1811.6
 Drill Size mm
BSF 1/2 x 1613.0
BSF 9/16 x 1614.8
BSF 5/8 x 1416.4
BSF 11/16x 1418.0
BSF 3/4 x 1219.5
BSF 13/16x 1221.0
BSF 7/8 x 1122.7
 Drill Sizemm
BSF 1“ x 1026.5
BSF 1.1/8 x 929.5
BSF 1.1/4 x 932.5
BSF 1.3/8 x 836.0
BSF 1.1/2 x 839.0

BA - British Association Thread

 Drill Size mm 
 BA 06.2 
 BA 15.5
 BA 24.9 
 Drill Size mm
 BA 34.2 
 BA 43.8
 BA 53.3
 Drill Size mm
 BA 62.9

BSB - Brit. Std. thread

 Drill Size mm 
BSB 1/4 x 266.5 
BSB 5/16 x 26 8.2 
BSB 3/8 x 26 9.8
BSB 7/16 x 2611.5
BSB 1/2 x 26 12.8

BSC - Brit. Std. thread

 Drill Size mm 
BSC 5/16 x 268.2 
BSC 3/8 x 26 9.8 
BSC 7/16 x 2611.5 
BSC 1/2 x 26 12.8

NPT - National Tapered Pipe

 Drill Size mm 
NPT 1/8 x 27 9.9
NPT 1/4 x 1913.5
NPT 3/8 x 1817.0 
NPT 1/2 x 1421.5
NPT 3/4 x 1427.0 
NPT 1“ x 11,533.5

Special Threads

 Drill Size mm
UNEF 1/4 x 326.5
Harley 1/4 x 246.5
Harley 7/16x1611.5
Cummins 11/16x1618.0
Carburetor 7/8 x 2022.5
Carburetor 1“ x 2026.0

8 UN

 Drill Size mm
1.1/8“x 828.5
1.1/4“ x 832.0
1.3/8“ x 8 35.0
1.1/2“ x 838.0
1.5/8“ x 841.0
1.3/4“ x 844.5
1.7/8“ x 847.5
2“ x 851.0