"Threads Showing" rule?

[Kyle Jeffries]

Is there a rule as to how many threads must be showing past the outer face of a nut in FSAE as there is in MiniBaja? If so, could someone point me to it...I can't seem to find it specifically stated in the rules.

Thanks!

Kyle Jeffries
University of South Florida

[Kyle Jeffries]

Is there a rule as to how many threads must be showing past the outer face of a nut in FSAE as there is in MiniBaja? If so, could someone point me to it...I can't seem to find it specifically stated in the rules.

Thanks!

Kyle Jeffries
University of South Florida

[Ben Beacock]

We had to change a couple bolts 2 years ago that were pretty much right flush with a nylon lock nut. They were happy with 1 thread past.

[BStoney]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Ben Beacock:
We had to change a couple bolts 2 years ago that were pretty much right flush with a nylon lock nut. They were happy with 1 thread past. <HR></BLOCKQUOTE>

In 2004, we had to change two or three bolts that had a little over one thread sticking out and tech said they wanted at least 2.

However, I think this makes sense because if I am thinking of it correctly, the locking feature on a Nylock doesn't actually function as designed until you get full-cut threads passing through the entire length of the nylon insert.

[fade]

what about centerlocking nuts? The kind that are distorted thread that can be installed from either side of the nut and the locking feature actually initiates in the center so if the bolt is flush you already have 2-3 threads past its locking point. I know they are not reuseable like nylocks and and can screw up threads if not hard enough but for applications where tight clearences outweigh reusable hardware they seem like a good alternative.

[Garlic]

Use common sense. There are no rules like Baja needs but if you use locking hardware in a manner that defeats its locking ability the judges will say something.

[Agent4573]

Our tech inspector last year made us have at least 2 full threads showing.

[Moody]

on this note, what do you guys do for 3-piece wheel hardware? we're not really sure what to do about our center-to-outer bolts.

I'm guessing that the judges won't accept our explanation that the the center seems to have an interference fit and they ain't comin out(?)

- matt

[Garlic]

Stover or interference nuts are considered locking hardware.

[Frank]

funny story,

a tech judge was calling us for not having threads protruding beyond the end of a nylock nut (although it was clearly "engaged")

he was suggesting we rectified the problem..

to get to the fastener was a total pain in the ass...

he stood his ground until someone kindly reminded him that the rules about locking fasteners dosn't apply to differential turnbuckles http://fsae.com/groupee_common/emoticons/icon_wink.gif

[fade]

do you know what i am talking about? the lock nuts that look like a plain hex nut with no special protrusions at either end. but on 3 of the flats there is a rectangle indention where the nut has been crimped and distorted just like the stover bolts but the bolt will spin for about 1.5 turns from either end and the distorted thread is in the middle of the nut so that if the end of the bolt is flush it is 2 or 3 turns past the middle of the nuts locking feature.