3 ms·Most likely they would use mils/thou. 25mils ~ 1mm Or 1/16in as others have said.by Evidlo 6y agoMost likely they would use mils/thou. 25mils ~ 1mm Or 1/16in as others have said.Hextinium 6y ago40 mils ~ 1 mm 1000 mils / 25.4 mm = 39.3 This simple fact still seems wrong to me somehow.Evidlo 6y agoBrain fart