Size bolts to mount the headlight cowling to the trees? – Harley Davidson Forums

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size bolts to mount the headlight cowling to the trees? - harley davidson forums size bolts to mount the headlight cowling to the trees?


always thought those 4 bolts to hold my headlight cowling to the trees….that hold the auxillary lights on, went in kinda screwy. looking at them in close detail, pretty sure prior owner screwed in wrong threads…

anyone know what threads they’re supposed to be? noticed today as i pulled the headlight assembly off…prior owner had finer thread on the longer two up top..versus the shorter bolts on the bottom.

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+61404532026, 06:28 pm

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size bolts to mount the headlight cowling to the trees? - harley davidson forums


if you mean the one on the sides of the trees they are 5/16″-24 fine thread, short length about 1/2″ or so and that depends on what add how you hang things, be careful about bottoming out the upper it can crush the tube cap a bit or strip the threads in the trees

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+61404532026, 06:32 pm

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size bolts to mount the headlight cowling to the trees? - harley davidson forums


the bolts are 5/16 x 24. if you use the the spotlights two are 1 inch long and two are 9/16. the are
widely stripped out. if you don’t have spotlights they are just 5/16 x24 9/16 long phillips head.

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+61404532026, 08:44 pm

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size bolts to mount the headlight cowling to the trees? - harley davidson forums


blue loctight is your friend

  #5  

+61404532026, 08:00 am

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size bolts to mount the headlight cowling to the trees? - harley davidson forums


ok..so the prior owner ran /18 thread through ’em. and apparently later put /24 thread in the upper ones..they’re longer ones….yup i do have the auxillary spotlights and according bars. (see my sig pic).

not well versed in chasing threads….i currently have new 5/16 18 thread bolts in there now. they go in tight. possible to re-chase the threads with /24 and it’ll hold?

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+61404532026, 10:58 am

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size bolts to mount the headlight cowling to the trees? - harley davidson forums


if they have already been threaded to 5/16 x 18 leave it. if they don’t hold you have a couple of choices. weld and drill/tap back to standard size or use helicoils

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