Just a quicky re- stud thread

[jug]

Hi Guys, just an easy one.
What type of thread are the cylinder base studs where they go into the cases on a 71 750 , BSW or UNC.
Thanks in advance
JUG

 

[Rohan]

Is this the part number you have in your parts book ?

http://www.ebay.com/itm/NORTON-COMMANDO ... 1635397988

This does 850 and later 750, not sure how far back it goes or if it covers all Commando.

 

[gortnipper]

Dont know if on here or not but this is a good reference.

Thanks, Steve!

fastener-sizes-part-number-chart-t17435.html

 

[jug]

Thanks guys. But its NM 24251. Pre 20000 engine #.
JUG

 

[L.A.B.]

But its NM 24251. Pre 20000 engine #.

3/8 - 16 BSW.

 

[jug]

Thanks Buddy, just wanted to be sure.
JUG

 

[cash]

According to my Zeus book UNC has the same pitch of 16 and normally should interchange.
Dave

 

[madass140]

same TPI but Whitworth thread angle is 55 degrees and UNC is 60 degrees

 

[L.A.B.]

According to my Zeus book UNC has the same pitch of 16 and normally should interchange.

http://britishfasteners.com/threads/bsw.html
BSW thread:

UNC thread: