Male Plastic Polycarbonate M4 insert wont fit in an M4 hole made on an Aluminum plate.

[JJAV1983]

How do I make sure that both parts are going to fit properly (loosely)? The call out for the insulator thread is: M4 x 0.7 - 6g. The assembler has to re-tap every single aluminium plate to be able to fit both parts.

The call-out for the threaded hole is : M4 x 0.7 - 6H.

Is there a way to indicate in the drawing to make the threaded hole to its maximum major and minor diameters?

Thanks..

JJAV

 

[powerhound]

JJAV1983,

There's no question that re-tapping the holes gets rid of whatever is causing them to fail to begin with because it solves the problem. What you need to do is find out what the problem is. There have been several ideas posted as to what may be causing the problem. Have you followed up on any of them yet? Are you making the plates in-house or is a supplier making them for you? If it's the latter then you need to be communicating with them about this.

Powerhound, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II