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Engine tin bolts

What size are the M8 seems bolts on the engine tin? 1.25? I need a handful and our host sells them in quantity of 50 (which I ordered, but seem to have been shorted a few).

Todd

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Old 11-13-2013, 09:53 AM
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Bolts on the engine tin are 6mmx1mm thread about 12mm long. Available at the fastener section of the hardware store unless you need the gold ones...
Bruce
Old 11-13-2013, 12:56 PM
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What kind of nut/washer combo are these? Nyloc or regular nut and a lock washer?
Old 11-13-2013, 01:54 PM
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engine tin doesnt use nuts.
Bruce
Old 11-13-2013, 03:23 PM
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Check mcmaster 90854A127

$8/50 zinc yellow chromate
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Old 11-13-2013, 07:04 PM
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Just go to your local hardware store. I did all mine for under five dollars. While you are at it, give those tins a fresh coat of paint and your car will look like a concours winner.
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Old 11-14-2013, 05:38 AM
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Anyone know why these fasteners used a captive wider and thicker than normal washer? These don't have high clamping load? Worth sourcing wide washers or just use standard M6 washers?
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Old 11-17-2013, 07:19 PM
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These look like them -
Hex Head Sems Body Bolt M6-1.0 X 12mm

Todd
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Old 11-18-2013, 12:08 AM
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run a tap in all the holes. makes things go in a lot better.
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Old 11-18-2013, 02:16 AM
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Toddu - yep those are spot on. However I already bought fifty std m6-12 hex heads without the captive washers. What makes those 'body bolts'?
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Old 11-18-2013, 04:25 AM
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The bolts are called "SEMS" (think that's an acronym for preassembled) bolts. That link I sent you can get 50 for $8. Good deal. If you have the bolts (are they yellow zinc?) already, I think these are the proper washer size -

http://www.eagleday.com/m6flwayezi.html

Todd
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Last edited by toddu; 11-18-2013 at 07:40 AM.. Reason: Forgot the link
Old 11-18-2013, 07:39 AM
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Yah I bought the yellow zinc bolts from my mcmaster link. What you linked to is basically the same price but with the correct captive washer - a better buy.
I guess what I'm asking is "in theory" why the captive washer? I'm always trying to learn more about fasteners and have not come across this before. Would it achieve the same thing as a flange head bolt?
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Old 11-18-2013, 07:43 AM
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Quote:
Originally Posted by r-mm View Post
Anyone know why these fasteners used a captive wider and thicker than normal washer? These don't have high clamping load? Worth sourcing wide washers or just use standard M6 washers?
maybe because the tin is thin and some of the holes are oval or big for fitting purposes.

thanks for the link.

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86 930 94kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
03 BMW 330CI 220K:: [__] RUNNING: [__] NOT RUNNING:
01 suburban 330K:: [__] RUNNING: [__] NOT RUNNING:
RACE CAR:: sold
Old 11-18-2013, 08:44 AM
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