Topic: Anyone know what the last 2 digits on a standard Honda part number means?

[markb]

By standard part number I mean like nuts and bolts.  For example, in the part number 92000-08040-0A,  92000 means its a hex bolt and 08040 means its an M8 x 40mm long.  I know the -OA is some kind of finish or material designation and that's what I'm trying to find out.  I've seen -0A, -0B, -02, -0S, -4J, -3B, -49 and maybe some others.  I've compiled a list of all the fasteners on sandcasts and k0's and it was looking to my like -0B was a plain hex head (no "8") but I've seen that suffix on the pan head screws too.  This info would be helpful when working on restorations.  Anyone?
Thanks,
Mark

[Johnie]

Not sure if this will help mark?

http://www.oldmanhonda.com/MC/HCodes.html

[Old Scrambler]

Honda changed the codes several times from '67 into the '70s mostly due to designating strength and making sure the mechanics used the correct fasteners that had changed thread pitches since 1966.  Some of the codes are superceding parts meaning its improved and should be used. In your case, a true restoration would require the original item code.  The sandcastonly group has IDs for every fasterner on the earliest bikes. After about #1500 they became much more standard.  Some of the parts codes also ID for chrome versus zinc versus black.

The little 8 is prevalent but a few heads are smooth instead of recessed on these bikes. If its of any help, I have a late production K0 that has never been apart. I could ID any head you need.

[markb]

Not sure if this will help mark?

http://www.oldmanhonda.com/MC/HCodes.html

Thanks Johnie, that link has some good info but nothing about the suffix definitions.

...The sandcastonly group has IDs for every fasterner on the earliest bikes...

I looked on their site but didn't find anything.  Could you steer me in the right direction?

If its of any help, I have a late production K0 that has never been apart. I could ID any head you need.

I might take you up on that.

Even the washers drive me crazy, especially after complete disassembly and replating.  There's over 30 different flat washers on sandcasts and early K0's with many variations on the OD and thickness for the same ID.  I finally made a list of all of them and where they go and what size they are.  The most prevalent are the M6 & M8 form B (thin) washers.  I just buy them in bulk instead of bothering with replating because they are usually junk anyway.
Mark