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Old 11-21-2004, 05:58 PM
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What is this part

Cleaning out a box of old parts and darned if I recognize what these are - still new on blisterpack... any ideas?

6 metal tubes about 2+" long, hollow and threaded on inside w/ 6 short bolts w/ oversided hex heads in package and 6 washers. Package says "API" and nothing else - back is blank.

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Last edited by pgtr; 11-24-2004 at 11:01 PM.
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Old 11-22-2004, 03:07 PM
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we need a pic, sounds like some kind of fastener
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Old 11-22-2004, 04:04 PM
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Picture doesn't work
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Old 11-22-2004, 04:11 PM
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Well, from my military dayz I learned that "API" stood for "Armor Piercing Incendiary". Somehow I dont think you have some of those. They sound like stand-off's
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Old 11-22-2004, 04:15 PM
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I agree with "standoffs," but for what? Anobody's guess.
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Old 11-22-2004, 11:25 PM
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I was kinda thinking 4 of them would make nice standoffs for working on a carb but six...?

THose are NOT washers as I thought - but black inserts attached to one end of the metal tubes. The other end is threaded. It's heavy machined steel - not some flimsy metal tubes w/ plating. (the rust is on the plastic not the metal underneath)

FWIW it came out of a box of car parts, mostly Chevy SB aftermarket performance odds and ends junk. This is the odd one that I can't quite figure...
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Old 11-22-2004, 11:45 PM
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API

Doc here

API stands for 1 of two things,

American Petroleum International

Or

Aerospace products International

I'd go with the latter, since they manufacture high performance brakes for aircraft, those might be caliper spacers to adapt them to a Vehicle..Part of a kit probably and included by the kit supplier "In Case"" they don't fit..??

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Old 11-23-2004, 12:26 AM
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They look high quality, hardened and precision. They look like stand offs for a aircraft brake assembly, the slider disks locate on them and to the hub the friction disks key into the drum. Somebody was probably thinking of making a slider clutch for a dragster with them. I helped make a slider unit years ago and we used a similar parts for the stand offs.
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Old 11-23-2004, 09:51 AM
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Yes, I think they are hardened and precisely ground. There is a slight bevel to the threaded end (they are hollow all the way thru) and the 'washers' pressed in on the other end are a tad wider in diameter. If they are 'sliders' they go in one-way I guess.

The quantity of six kinda throws me. Could it be some sort of floating caliper slide? I know nothing about planes but on cars the calipers usually slide on 2 slides in every case I've seen.

One other problem, the bolts included maybe a 1/2" long. If these were used to mount it in a brake calipre type application I would expect they would be mounted to a fairly beefly backing plate - on a car a thick cast piece - the bolts simply aren't long enough to go thru that and have any significant thread left to thread the tubes. In fact on most of my cars they wouldn't even have anything poking thru.

I peaked under the head of one bolt and did NOT see any grade markings - just a cirlce like an O.

They may in fact having nothing to do w/ anything transportation related and just happened to be in a box w/ a bunch of new and used performance car parts.
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Old 11-23-2004, 10:35 AM
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what is it?

IF those are a crowned bolt head, has 6 slots in it, then it should be a grade 8, adonized finish bolt.
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Old 11-23-2004, 11:12 AM
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The bolt head is slightly recessed (crowned?). No embossed slashes to indicate grading - just a 'circle' embossed in the middle. Looks more like it's black phosphate than anodized.
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