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Socket head bolt length

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Old Mar 3, 2025 | 10:34 PM
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Default Socket head bolt length

Hi, I bought a used 2021 Heritage Classic that already has passenger footboard installed. I want to install HD saddlebag guards but I need longer bolts. The HD number of the bolts are: 4519 and 4202. I'm able to determine that they are socket head 3/8-16 but I can't find information on the lengths. I'm hoping someone might have access to better information than I have. Thank you.
 
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Old Mar 4, 2025 | 06:09 AM
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Measure the thickness of whatever your bolting together, add a diameter and a half min. of thread lenghth. In your case 9/16.
This rule of thumb for any bolt.
 
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Old Mar 4, 2025 | 06:25 AM
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Those same bolts are part of the Softail Passenger Footboard Kit. You could remove those and measure them?
 
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Old Mar 4, 2025 | 06:58 AM
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Originally Posted by GalvTexGuy
Those same bolts are part of the Softail Passenger Footboard Kit. You could remove those and measure them?
Yes, they are part of the kit but the floorboards are already installed with the shorter screws. I dont have those longer screws and I wanted to buy them locally. HD wants $20 each for them from what I can tell. I guess if I can't find the length, I'll have to buy them from HD. I'm going to have the dealer do the install.
 
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Old Mar 4, 2025 | 07:08 AM
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So, you’re going to supply the saddlebag guards and the bolts, then have the dealer do the install? Huh?
 
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Old Mar 4, 2025 | 08:40 AM
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I`m confused, you know the part numbers for the bolts, and the dealer is going to install the parts......

What more could you need to know?
 

Last edited by Dan89FLSTC; Mar 4, 2025 at 08:45 AM.
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Old Mar 4, 2025 | 12:43 PM
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Originally Posted by Dan89FLSTC
I`m confused, you know the part numbers for the bolts, and the dealer is going to install the parts......

What more could you need to know?
Just trying to get the $3 bolts at a hardware store rather than pay $20 for a $3 bolt.
 
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Old Mar 4, 2025 | 02:15 PM
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This is from Google so take it FWIW.
4519: 3/8-16 X 4-1/4" grade 8
4202: 3/8-16 X 4" grade ?
 
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Old Mar 4, 2025 | 02:31 PM
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Originally Posted by Hematite
Just trying to get the $3 bolts at a hardware store rather than pay $20 for a $3 bolt.
Make sure you use a grade 8 bolt in that location (not cheap hardware store stainless).

You will probably find these are available in Black Oxide (which will look like $hit after they start to rust).

I would be surprised if the dealer will use bolts that you supply, because the dealer will be responsible for the install.
 

Last edited by Dan89FLSTC; Mar 4, 2025 at 02:48 PM.
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Old Mar 4, 2025 | 03:38 PM
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Originally Posted by barneyboy
This is from Google so take it FWIW.
4519: 3/8-16 X 4-1/4" grade 8
4202: 3/8-16 X 4" grade ?
Wow, thanks! I just couldn't find that info no matter how many times I tried!
 
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