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Mini bobbins
Chippy - 16/3/06 at 05:49 PM

HI, anybody happen to know what thread is on the BL Mini exhaust rubber bobbins, tried measuring, certainly not metric, but then again not a direct match for imperial. I have two new ones but no nuts. Hope somebody can assist, thanks, Ray

stevec - 16/3/06 at 05:53 PM

I think 5/16 UNF

[Edited on 16/3/06 by stevec]

RazMan - 16/3/06 at 06:13 PM

quote:
Originally posted by stevec
I think 5/16 UNF

[Edited on 16/3/06 by stevec]


Yep

Nick Skidmore - 16/3/06 at 07:13 PM

I've noticed that some replacement bobbins imported from China / India have had UNC or Whit threads on them.

I guess it's a combination of old machinery and less turns of the spanner to do them up.

suparuss - 16/3/06 at 07:35 PM

ive got some halfords ones which measure as a whitworth thread. dont know whitworth so bugger knows what to ask for at the counter.

owelly - 16/3/06 at 10:15 PM

I got some the other day from the local exhaust emporium and they are 8mm....!

owelly - 16/3/06 at 10:15 PM

I got some the other day from the local exhaust emporium and they are 8mm....!

Chippy - 16/3/06 at 10:20 PM

Thanks guys I feel that mine may be 5/16 UNF, as they are very old stock, will get some nuts and try them. atb Ray.

Peteff - 16/3/06 at 11:51 PM

The nuts will be 1/2"af, easily mixed up with 13mm for the M8 thread so don't try to force them on if they don't go easily.

02GF74 - 17/3/06 at 02:09 PM

From memorym Whitworth and UNF (or is it UNC or BSF??) are idnetical up to a certain size, about 1/2 inch diameter; then are incomaptible afterwards.

The answer will be out there if you google..