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  1. #16
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    Wentzville.MO 40 "miles west of St Louis"
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    If it dont have ARP stamped on it... don't use it
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  3. #17
    Join Date
    May 2001
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    Charlotte, NC
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    Ok, would an ARP 3/8” UNF bolt work (instead of the UNJF thread)?

  4. #18
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    Apr 2001
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    St. Amant, LA
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    Quote Originally Posted by SCT View Post
    Bump for a good thread.

    i recently bought a SeaStar Pro front mount h-steering. It came w- the ARP 3/8” x 1.35 INJF. Unfortunately, w- my application, the bolt is not long enough and ARP doesn’t want to sell me a longer one. Would a grade 8 Bolt be comparable to the supplied ARP bolt? Does UNF thread fit a UNJF thread?

    Thanks for any help-

    FYI
    ARP Bolts Merc Part #'s
    10-875273-138 =1.38" long
    10-875273-150 = 1.5" long
    10-875273-162= 1.62" long

  5. Thanks phillnjack thanked for this post
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  6. #19
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    slough, england, united kingdom
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    you all got me wondering whats in my hydraulic steering now... something tells me mine dont say ARP
    next thing to look at now ha aha
    Last edited by phillnjack; 12-10-2020 at 02:28 PM.

  7. #20
    Join Date
    May 2001
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    Madison, WI
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    22R... thanks for the part numbers!

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  9. #21
    Join Date
    Jun 2018
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    Floating around
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    Smokey used ARP fasteners for everything he built. That says a lot right there.

    That tidbit aside there were some off shore ARP knock offs being made that were so close to genuine ARP visually that even ARP could not id the real from fake without testing them. ARP said the only way to be sure your getting the genuine fasteners was to buy directly from them. I’m sure seastar and other reputable outfits are selling genuine parts but I thought it worth a mention here because of the major safety aspect involved. If it’s cheap price and the seller is some online only drop shop or e bae type seller you might want to think twice.

    better to be sure right.
    Hydrostream dreamin

  10. #22
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    Jul 2006
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    Wisconsin
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    Quote Originally Posted by SCT View Post
    Bump for a good thread.

    i recently bought a SeaStar Pro front mount h-steering. It came w- the ARP 3/8” x 1.35 INJF. Unfortunately, w- my application, the bolt is not long enough and ARP doesn’t want to sell me a longer one. Would a grade 8 Bolt be comparable to the supplied ARP bolt? Does UNF thread fit a UNJF thread?

    Thanks for any help-
    Allen's Fasteners sells individual ARP bolts:
    https://www.allensfasteners.com/detail.asp?
    https://www.allensfasteners.com/deta...oduct_ID=0529A

    "ARP IS BETTER THAN GRADE 8 (300 STAINLESS STEEL)NOMINALLY RATED AT 170,000."

  11. #23
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    30 foot pounds and red loctite and snug the nut

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  13. #24
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    10-849838 That is the Merc part #


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  15. #25
    Join Date
    Jan 2002
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    JAX. FLORIDA
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    There is a real problem with "Traceability" and many an engine/airframe has had to be disassembled do to Chinese counterfeits being sold into the supply chain. Buy it from someone like Merc who surely polices their supply chain.

    "Confidence" is that wonderful feeling you had right before you fully understood your true situation.- Unknown
    I don’t know what effect these men will have upon the enemy, but, by God, they terrify me.- Duke of Wellington
    “I am not afraid of an Army of lions lead by a sheep; I am afraid of sheep lead by a lion.” – Alexander the Great
    Whoever said the pen is mightier than the sword obviously never encountered automatic weapons.-Douglas MacArthur

    Allison GSE 300XS

  16. #26
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    How can you be sure what merc has being as they have over 50% of their stuff made in china now away ?

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