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KC in S.B.
KC in S.B.
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Thread Like Summary
Allan G, Beach, Gary E, gavin eisler, S-NJ-W, stanoneandonly
Total Likes: 7
Original Post (Thread Starter)
#847357 04/28/2021 2:45 AM
by Dennis Yurcik
Dennis Yurcik
Hi all,
BSA fettling took a back seat for long while. Trying to get my rear in gear for the nice weather.

I always wanted to replace the nuts on the rocker cover with domed/acorn nuts. Wondering if there is a good source out there anyone can recommend.
I've don't see much in the searches on the usual brit bit suppliers websites, but maybe a phone call is warranted.

I've notice that a metric M6-1.0 nut seems to fit the rocker bolts decently, but not perfect. A touch sloppy. Does anyone know if these are a specialty thread? The BSA parts book doesn't clarify those details.

Any advice is much appreciated.
Liked Replies
#847384 Apr 28th a 12:09 PM
by Nick H
Nick H
You could look up the part 68-0137 on this database:
2 members like this
#847793 May 2nd a 03:49 PM
by Mark Z
Mark Z
Originally Posted by NickL
Just use half a dozen 1/4 BSF Allen bolts with fibre washers, job done.

Forgive me if this is approaching OCD territory, and I'm sure you've heard it before, but: The advantage of studs and nuts over bolts is that you're not unscrewing and screwing into the aluminum every time you remove the cover.
2 members like this
#847360 Apr 28th a 03:28 AM
by DMadigan
First, suggest you at least download a parts and repair manual then you would know these bikes were never metric. What thread depends upon what year. early bikes would be BSC thread and later SAE. '70 parts book clearly states 1/4" BSC for the domed nuts.
1 member likes this
#847632 May 1st a 03:33 AM
by NickL
Just use half a dozen 1/4 BSF Allen bolts with fibre washers, job done.
1 member likes this
#847549 Apr 30th a 08:13 AM
by Allan G
Allan G
Those “German helmet” spike nuts are perfect for holding your pie in place to warm through on the rocker box, a bit of lock wire wrapped around them and your good to go wink

Just ask Kent Shaun.
1 member likes this
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