Bolts for brake cylinder

    Hi guys


    Can anybody please tell me how the bolts for the rear

    brake cylinders on the baking plates where plated?

    Mine are painted black i need redo them.


    Please help!

    Thanks Jerry

    Jerry,

    They are zinc plated: 5/16-18X1/2 HEX, tooth Sems, GR2. AMK lists them as phosphated and oil under p/n 42757-S2 (AMK p/n B-12307). This should set a fire under someone.

    Jim

    Thank you very much. Has the different coating something to do with the Year or

    is AMK just wrong when the say Phosphate coated?

    Very interesting because i always thought AMK Stands for concours

    stuff. hmm,.....????

    AMK is about 80 percent correct on hardware. Max used the Ford Car Parts manual to set up his data and that parts data is replacement types. The factory would specify one thing for assembly line use and service would use something different: instead of a Sems bolt, a seperate bolt and lock washer; instead of zinc plating, phosphate and oil; instead of a toothed disc washer bolt, a washer head bolt. This was to reduce the number and types of replacement parts a dealership would have to carry for many different year model cars. That's why the Mustang Assembly Manuals are useful. Also the guys that pull off a piece of original hardware and do a look-see help a lot.

    Jim

    Thank's Jim that was very helpful! I will put together the rearend

    (housing and 3rd member) this weekend. Axles next week when

    new bearings are on. I can post a picture then.

    Bye Jerry

    You are one of the posters that asks "What Plant?" or "What year?" on detail questions like this, so, I'll do the same.

    What I've seen are rusty or oil covered bolt heads, rusty or covered toothed washers and shiny threads on brake cylinder several 65 and 66 San Jose cars that I own or have worked on, eg zinc. I also note that the two piece Ford Service replacements (screw and lockwasher) are zinc (cad) plated. Were phosphated screws used? Sure. Ford's prime concern was making and selling cars, not documenting what they did, so a line replacement could be anything to keep the line movong. Keep this in mind, the brake cylinder was attached to the backing plate as a sub-assembly along with all the other brake related parts. I assume it was under Ford control for assembly as well as quality and these parts were specified for service based on the original factory spec, although we know that to be misleading.

    Jim

    Ok if both were seen then it makes it easier for me.

    If you write zinc cad plated i have a little problem.

    Did they really coat them with two different things?

    If they are cad plated (white) like the nuts that

    hold the backing plate, that would be great because

    i could do that at work. Phosphate also but not zinc.


    Thank you guys

    Jerry

    I've seen the phosphate variety on cars from more than one assembly plant.


    I think the main thing to get right is the type of fastener, which has a captured star washer. I would never fuss if it was either zinc or phosphate finish. Of course, just another area of the assembly manuals that gives us something to go by, but doesn't necessarily tell the whole story.

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