Cylinder Head Cover - Cross Screws

[jarl1967]

i need to replace the 6x18 cross screws (93500-06018) used to attach the cylinder head cover on my 1966 CL77. Does anyone know if Honda changed the thread pitch for these screws, and thus I need to be careful to find the correct ones (i'm guessing the dreaded JIS which is becoming next to impossible to find!)

jarl

[Dgormley]

Jarl, I am pretty sure you're all right on those screws. I think it was the smaller screws you have to worry about. (LM?)

[FAST FRED]

NOT TO WORRY JARL ONLY 3,4 AND 5MM SCREWS ARE DIFFERENT THREAD PITCH. THE THREAD PITCH FOR 6MM SCREWS HAS ALWAYS BEEN THE SAME JIS OR IOS.

FAST FRED

[jarl1967]

thanks guys...both responses were very helpful.

it brings up another question though....can someone explain the meaning of the suffixes I see after most of the screws/bolts: -0A, -0B, -0S, -02 etc;
i thought i read somewhere that it is a finish designation but would like to be more informed.

appreciate any info.,
jarl

[Dgormley]

Bill Silvers' Restoration manual gives an explanation on the markings,The letters refer to: model,shape, material and plating

[gramey7]

-02 is a chrome finish; I think -0A is the ISO thread version of the original JIS thread pitch for 3,4, & 5mm fasteners