AJS M14 Lightweight

[Waterslade6]

The light weight has two drain plugs one is longer than the other under the engine I presume that they are both BSF Thread! does any other club member able to identify these thread wise, size etc. and the washer used on both are they fibre
or copper. Many thanks Phil

[Ozmadman]

Have a look at these two threads. Not sure what the original washers were made of but probably copper but I have fibre ones on mine now.

http://www.jampot.com/forum/viewtopic.p ... gs#p155508


http://www.jampot.com/forum/viewtopic.p ... gs#p136325

[clanger9]

Both are 3/8" BSP 19 tpi [edit: NOT 5/8" UNF thread]. The rearmost (042201) plug is the short one with the magnet. The front one (042160) is longer and thinner.
Both have the same fibre washer (042186)

[Ozmadman]

Both are 5/8" UNF thread. The rearmost (042201) plug is the short one with the magnet. The front one (042160) is longer and thinner.
Both have the same fibre washer (042186)

UNF?? Interesting? I am sure my font plugs thread is more coarse than the rear one for some reason. Something to check when I next change the oil I think

[clanger9]

Now you've got me wondering! I measured the rear one as UNF. I'll need to check the front one now...

[Ozmadman]

Now you've got me wondering! I measured the rear one as UNF. I'll need to check the front one now...

Was wondering as everything else is either BSF or BSC which is a fine thread. Took pictures of most things but not those unfortunately

[clanger9]

Just checked: 5/8" 18 tpi, which I think means UNF.
Isn't BSF 5/8" 14 tpi?? Apologies if I've misled anyone...

[ajsph]

I have a lightweight drainplug and it is 3/8 BSP thread, it is the same as on my twin.
best regards
Poul

[clanger9]

Poul is correct. I checked more carefully this time (my bad).
It's 19 tpi, 5/8" diameter. So 3/8" BSP.

[Ozmadman]

Poul is correct. I checked more carefully this time (my bad).
It's 19 tpi, 5/8" diameter. So 3/8" BSP.

So is that for both of them?