I have a spark plug cross threaded. I know the plug has 1.25 treads per mm, must convert to inches to get a drill bit, tap.and helicoil to ream this puppy a new hole!!!
2007-05-20 17:26:04 · 3 answers · asked by 10 Bears 1 in Cars & Transportation ➔ Maintenance & Repairs
Actually there are 25.4 mm in 1 inch (there are 2.54 cm per inch)
The calculation is straight forward, but not sure if this is what you want:
1.25 threads/mm * 25.4mm/inch = 31.75 threads/inch
Or 31.75 threads per inch
2007-05-20 17:58:25 · answer #1 · answered by hsueh010 7 · 0⤊ 1⤋
if this helps 25.4mm is 1 inch.But what your describing is 1 and a quarter turns per mm to a thread which gives you a length.unless you have worded wrong??You can take it to a hardware shop,the sparkplug,and try an see which nut fits whether it be a metric or imperial and go from there.
2007-05-21 00:35:00 · answer #2 · answered by simonj_smith 4 · 0⤊ 0⤋
25.4 mm to the inch=31.75 threads per inch
2007-05-21 08:38:45 · answer #3 · answered by paul h 7 · 0⤊ 1⤋