BA Thread Data

Thread TPI Major Dia. Pitch Tapping Drill
0 25.4 6.0mm 1.00mm No. 5 5.1mm
1 28.2 5.3mm 0.9mm No. 14 4.5mm
2 31.3 4.7mm 0.81mm No. 22 4.0mm
3 34.8 4.1mm 0.73mm No. 29 3.45mm
4 38.5 3.60mm 0.66mm No. 31 3.00mm
5 43.1 3.20mm 0.59mm No. 36 2.65mm
6 47.9 2.8mm 0.53mm No. 41 2.30mm
7 52.9 2.5mm 0.48mm No. 45 2.05mm
8 59.1 2.2mm 0.43mm No. 49 1.80mm
9 65.1 1.9mm 0.39mm No. 52 1.55mm
10 72.6 1.7mm 0.35mm No. 54 1.40mm
11 81.9 1.5mm 0.31mm 3/64" 1.20mm
12 90.7 1.3mm 0.28mm No. 57 1.05mm
13 102.0 1.2mm 0.25mm N0. 60 0.975mm
14 110.0 1.0mm 0.23mm No. 66 0.775mm

 

Sourced from http://www.royalsignals.org.uk/articles/threads.htm


Leave a comment

Comments have to be approved before showing up

Newsletter: Sign up for exclusive specials and professional tips

G'Day, we are true blue Australians.
SSL