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Carey's advice is always correct but I'd go one step further. Those "aviation" style speed nuts ( tinnerman ) nuts were meant to be used with " sheet metal screws" and naturally won't do the job right with the screws on the emblem supplied.  Need to sleep well at night ? ....push on those spring tinnerman nuts to your hearts content and follow up with a nylock nut. Check your tire pressure often and beware of potential cracks in your windshield......Thanks, Carey....:-)

I found that the fiberglass is often too thick for the tinnerman nuts to to be installed.

It seems many badges and emblems have "posts" that are only long enough for  the them to be installed in sheet metal.

I modified a cheap flat blade wood drill to cut a counterbore into the fiberglass on the inside.  The counterbore  has to be big enough to allow the full length of the tinnerman nut to be flat against the bottom of the counterbore.

This worked really nice but don't over do to !!  Otherwise you could have a huge hole to fill !  See drawing below...........Bruce

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Carey's advice is always correct but I'd go one step further. Those "aviation" style speed nuts ( tinnerman ) nuts were meant to be used with " sheet metal screws" and naturally won't do the job right with the screws on the emblem supplied.  Need to sleep well at night ? ....push on those spring tinnerman nuts to your hearts content and follow up with a nylock nut. Check your tire pressure often and beware of potential cracks in your windshield......Thanks, Carey....:-)

TBH, those aren’t the right clips for emblem posts (although they’ll work) Like you say, tinnerman or “speed nuts” are made to use with coarse thread screws. The actual hardware for emblem posts is just two barbed edges on piece of spring steel.

Emblem posts made to attach this way aren’t threaded, like the ones that are meant to attach with a nut and washer. They’re just posts.
Another tool that installs (and removes) them pretty well is a pair of flat-nosed pliers. Use the flat nose to push on the sides that are upper left/lower right in the above pic which lets the barbs flex.

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Last edited by dlearl476
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