Rail kit Bolts
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Rail kit Bolts

  1. #1
    Senior Member Rain Maker MN's Avatar
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    Default Rail kit Bolts

    What size bolts should be used when attaching the rails and plates to the stringers?

    Was thinking of going 1/2, but couldn't find any of the big marine parts dealers selling anything longer than 3 inches?

    Maybe 1/2" is overkill ?

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    Senior Member NiceGuyEddie's Avatar
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    Quote Originally Posted by Rain Maker MN View Post
    What size bolts should be used when attaching the rails and plates to the stringers?

    Was thinking of going 1/2, but couldn't find any of the big marine parts dealers selling anything longer than 3 inches?

    Maybe 1/2" is overkill ?
    7/16

    Ace hardware has what you need. Make sure you buy stainless!

    Then call Rex Marine for some stringer washers. Everything should put you under $40.
    Last edited by NiceGuyEddie; 03-04-2009 at 11:20 AM.

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    Senior Member Chris The Plumber's Avatar
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    Default rail kit

    A good rail kit is always approx. 30" long & longer in some cases, with that kind of distributed mounting points 3/8" works fine, you could get away with 3 per each side,We alway use 3/8" Coarse or Fine & use Nylock nuts, stainless is a must, If the rail kit has a Flat strap of alum. that goes on the outside of the stringer it's not necessary to use stringer washers otherwise definately use stringer washers.
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    Jackwagon Patrolman Rexone's Avatar
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    Quote Originally Posted by rIVERtRASH View Post
    7/16

    Ace hardware has what you need. Make sure you buy stainless!

    Then call Rex Marine for some stringer washers. Everything should put you under $40.
    We have complete selection of stainless, hex, socket head, more, and 3/8 should be adequate.

  6. #5
    Senior Member NiceGuyEddie's Avatar
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    Quote Originally Posted by Rexone View Post
    We have complete selection of stainless, hex, socket head, more, and 3/8 should be adequate.

    Good to know in the future. Looked at my reciept, I did buy 3/8...my bad.

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    Senior Member swtd's Avatar
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    Quote Originally Posted by Rexone View Post
    We have complete selection of stainless, hex, socket head, more, and 3/8 should be adequate.
    Do you also have the extended intake grate chamfered allen bolts to exceed 1/4 inch for njba requirements?

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    Jackwagon Patrolman Rexone's Avatar
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    Quote Originally Posted by swtd View Post
    Do you also have the extended intake grate chamfered allen bolts to exceed 1/4 inch for njba requirements?
    I'm sorry I would need a more specific description, not familiar with NJBA requirement specifically. Would need size and material needed specs... Personally I would be running stainless on an intake unless they were the equivilent of ARP 300 stainless in strength (I'm not aware of ARP's in a flat head socket config). Otherwise it would be grade 8 steel at a minimum for me.

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    Recently I read on this forum that grade 8 bolts (only) should be used on intake grates/loaders and to not use stainless bolts.

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    Senior Member ironman's Avatar
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    3/8 bolts will work fine, If you are going to use stainless make sure to use anti-seize on the threads. I would space the bolts 6-8 inches on center and try to stagger them if you can so they are not in a straight line. Good luck with your install.

    Ironman

  11. #10
    JetBoat Marine Parts&Svc jetboatperformance's Avatar
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    X2 re the stainless for the rails to stringers , Rod re the Loaders ,heres how ours go out Grade 8 o'size & (with bottom trim/install intructions) Tom

  12. #11
    B1 Racing cs19's Avatar
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    Use 3/8 bolts.
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  13. #12
    Senior Member ol guy's Avatar
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    Quote Originally Posted by cs19 View Post
    Use 3/8 bolts.
    ditto! 3/8 bolts are fine! with the distribution of weight and torque factor involved good to go! Just do me and your'e self a favor, if you are drilling into virgin wood use a sealer to protect for water penatration into the stringers! Water will find any way to get absorbed into wood and add weight and wood rot that doesn't show till it's to late. If it is a fresh build and may get moved for a correction then fill the drilled holes with silicone and coat the bolts then install. If it is a one shot deal then drill and seal with resin and STILL silicone bolts for installation. better safe than sorry! Also if you choose stainless please use anti-sieze on the threads for later removal for any reason, Stainless tends to thread bind and I have found the a dab of anti-sieze works wonders! IMLAO M

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