What size hole to tap to 7/16"?

[4x4100E]

I've worked out its cheaper to re-drill my hubs, fit 7/16" studs and use commonly available 7/16" sleeve nuts than to buy the proper Sleeved Wheel bolts for the job, just need to know what size hole I need so I can tap it out to 7/16".

Cheers

Matt

[jsf55]

http://www.laymar-crafts.co.uk/info2.htm that covers unc and unf !

[langysrodshop]

9.9mm tapping 11.3 clearence. Get yourself one of these, The engineers bible http://www.tooled-up.com/Product.asp?PID=6505&MAN=Zeus-Data-Chart-And-Referance-Tables-Book

[4x4100E]

I've got one at home but i'm not there so its not much use lol.

Matt

[langysrodshop]

Like all good book's read and remember Matt.

[jsf55]

And mines in work, if i ever get stuck, i put a caliper inside a nut and use the nearest drill i have too that, not very scientific, but gets u by !