Interpretation ID: nht68-4.21

DATE: 11/18/68

FROM: AUTHOR UNAVAILABLE; R. Brenner for William Haddon, Jr., M.D.; NHTSA

TO: General Motors Corporation

TITLE: FMVSS INTERPRETATION

TEXT: Thank you for your letter of September 25, 1968, regarding Federal Motor Vehicle Safety Standard No. 211 and the use of hexagonal wheel nuts.

The requirement of this standard that wheel nuts, hub caps and wheel dirce "shall not incorporate vinged projections" apparently applied to all wheel nuts, whether hexagonal or otherwise.

I agree that clarification of the standard is needed, but the method of accomplishing this is yet to be resolved. I have asked the Motor Vehicle Safety Performance Service to look into this problem immediately and to take the neccessary steps to relieve any undue burdens.