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Tapping Sizes

IMPERIAL

UNC UNF 
TAP SIZEDRILL SIZETAP SIZEDRILL SIZE
#1-64Number 53#0-803/64
#2-56Number 51#1-72Number 53
#3-485/64#2-64Number 50
#4-40Number 43#3-56Number 46
#5-40Number 39#4-48Number 42
#6-32Number 36#5-44Number 37
#8-32Number 29#6-40Number 33
#10-24Number 25#8-36Number 29
#12-24Number 17#10-32Number 21
1/4-20Number 7#12-28Number 15
5/16-18Number F1/4-28Number 3
3/8-165/165/16-24Number I
7/16-14Number U3/8-24Number Q
1/2-1327/647/16-20Number W
9/16-1231/641/2-2029/64
5/8-1117/329/16-1833/64
3/4-1021/325/8-1837/64
7/8-949/643/4-1611/16
1-87/83/4-1613/16
1-1/8-763/647/8-1415/16
1-1/4-71-7/641-141-3/64
1-1/2-61-11/321-1/8-121-11/64
1-3/4-51-35/641-1/4-121-27/64
2-4-1/21-25/321-3/4-121-43/64

METRIC

COARSE FINE 
TAP SIZEDRILL SIZETAP SIZEDRILL SIZE
1.0 x 0.250.754 x .353.6
1.1 x 0.250.854 x .53.5
1.2 x 0.250.955 x .54.5
1.4 x 0.31.16 x .55.5
1.6 x 0.351.256 x .55.5
1.7 x 0.351.36 x .755.25
1.8 x 0.351.457 x .756.25
2.0 x 0.41.68 x .57
2.2 x 0.451.758 x .757
2.5 x 0.452.058 x 18
3.0 x 0.52.59 x 19.25
3.5 x 0.62.910 x .759
4.0 x 0.73.310 x 18.8
4.5 x 0.753.710 x 1.2510
5.0 x 0.84.211 x 111.25
6.0 x 1512 x .7511
7.0 x 1612 x 110.5
8.0 x 1.256.812 x 1.513
9.0 x 1.257.814 x 112.8
10 x 1.58.514 x 1.2512.8
11 x 1.59.514 x 1.512.5
12 x 1.7510.216 x 115
14 x 21216 x 1.514.5
16 x 21418 x 117
18 x 2.515.518 x 216
20 x 2.517.520 x 119
22 x 2.519.520 x 1.518.5
24 x 32120 x 218
27 x 32422 x 121
30 x 3.526.522 x 1.520.5
33 x 3.529.522 x 220

BRITISH ASSOCIATION BA

TAP SIZEDRILL SIZEDIAMETER
05.1mm6.1mm
14.5mm5.4mm
24.0mm4.8mm
33.4mm4.2mm
43.0mm3.7mm
52.65mm3.3mm
62.3mm2.9mm
72.05mm2.6mm
81.8mm2.25mm
91.55mm1.95mm
101.4mm1.75mm
111.2mm1/16
121.05mm1.4mm
130.98mm1.3mm
141/321.1mm
150.7mm0.98mm
160.6mm0.88mm

MODEL ENGINEER ME

TAP SIZETPIDRILL SIZEDIAMETER
3/32401/83.9mm
3/16407/324.7mm
7/32403/165.5mm
1/4325.4mm6.3mm
1/4407/326.3mm
9/32323/167.1mm
9/32403/167.1mm
5/16327.0mm7.9mm
5/16409/327.9mm
3/8328.6mm9.5mm
3/84011/329.5mm
7/163210.2mm11.1mm
7/164013/3211.1mm
1/23211.8mm12.7mm
1/24015/3212.7mm

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Page last modified on July 08, 2017, at 09:47 AM