Tap size and tread pitch for Colt 1911 grip bushings

[Pre-1898]

Can anyone tell me what tap size and tread pitch I need to install colt 1911 grip screw bushings ?

 

[remp49]

The grip bushing thread size is .236 x 60 tpi and the grip screw is .150 x 50 tpi.

 

[Pre-1898]

Thanks for the info ! very useful to me.