I've heard some conflicting info on the subject, so I figured I'd consult the hive mind. Regarding the wire-type hose clamps used all over...

1) Were they all clear zinc/cad, all yellow zinc (zinc with yellow chromate), or are their two variants?

2) If two variants, what is the rule of thumb as to which ones go where?

3) If two variants, did they have different part numbers?

I ask because it was my understanding (perhaps incorrect) that they were all clear zinc, then I discovered this when disassembling my clutch master cylinder tonight:

Extra credit: Have any other data guru's out there put together a spreadsheet that lists all clamps and their sizes?

Thanks!

Oh yeah, this is from a May 1971 car

10 hours ago, Broman said:

I discovered this when disassembling my clutch master cylinder tonight:

I'm not sure when they changed the clamp style, but on the really early cars they used a different clamp style.

Does you think your master is original to the car?

Edited Friday at 01:02 PM3 days by Captain Obvious

OK, I was so focused on the finish color I totally missed the fact that the screw was a hex-head instead of a pan-head JIS! D'oh!

Captain, I really don't know the history of this car...so nothing surprises me.

But here's my basic question...now that I have all the small hardware cleaned and ready to send out for plating, should all my hose clamps go in the "clear zinc" box or the "yellow zinc" box?

23 hours ago, Broman said:

But here's my basic question...now that I have all the small hardware cleaned and ready to send out for plating, should all my hose clamps go in the "clear zinc" box or the "yellow zinc" box?

Yes, I apologize... In true internet forum fashion, I got involved in the topic and never answered the question that was asked. And I also apologize that I do not know the answer.

I've heard that "everything in front of the firewall was yellow chromate, and everything behind the firewall was clear." Not sure if that's 100% correct, but it's more correct than not. So if that rule holds true, then your brake master clamps should be yellow.

Yeah, but that rule of thumb might be better said that "everything in the cabin is clear, otherwise yellow". Because most all the undercarriage is yellow. It seems like Nissan felt that if it is to be seen (without opening the hood), it should be silver-colored. Yellow, with it's additional chromate protection, seems to be mostly reserved for items out-of-sight of passengers.

But I'd still like additional opinions...what color(s) have you seen your original hose clamps? I mean both the engine compartment ones as well as the one back by the fuel evap tank.

The $300k BaT car is a good place to look. It's pretty original

@inline6 now's your time to shine some of that knowledge on this fellow restorer. 🤓

So I took a close look at the $310K BAT Green Series 1 and was a bit surprised. In multiple places is looks like the hoops are yellow and the screw mechanism is clear. Am I imagining this?

Nope, you're not imagining...

@AZ 240 Care to chime in?

I don't recall seeing any yellow double wire clamps on the car originally - hoops or otherwise, at least not yellow like the plating we see today.

I was at Caffeine and Octane and a couple of guys who used to plate stuff as their business commented on my yellow chromate /zinc plating. They said something about how difficult it is to replicate the original yellow plating because the chemicals are different or something like that. They said we all have to put up with the 'really yellow' plating we have now.

I am unsure of the accuracy of that statement. Others, especially original owners, should chime in here if possible, but my recommendation would be to go with clear zinc for all the hose clamps on the car because if you go with yellow chromate, you'll almost certainly end up with a much more yellow color than anything you see that originally had a very slight yellow tint.

With my examination of the hardware on my car I found few if any exceptions to:
clear zinc:

• all JIS (cross in the head) screws

• all clamps

• coil bracket

• spare tire hold down

• door latches and catches

• some lock washer and flat washers - as used with JIS screws

I believe the hardware list I uploaded has the color listed. It is not exhaustive, but it is extensive.