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  1. #21
    Registered GregP's Avatar
    My Boats:
    1989 Scorpion 32 CC
    Join Date
    Apr 2001
    Annapolis MD

    Re: Getting rid of stainless fasteners

    From a Grade 8 spec listing:

    Screws meet SAE J429. Rockwell hardness is C33-39 with a minimum tensile strength of 150,000 psi. Made of medium-carbon alloy steel that has been quenched and tempered. Screws are grade marked on top of head (six radial lines indicate Grade 8).

  2. #22
    My Boats:
    one slow Fountain, one fast ice boat.
    Join Date
    Feb 2002
    Traverse City, Michigan

    Re: Getting rid of stainless fasteners

    Be careful when buying fasteners. I'm in the defense industry and we were burned badly by a supplier who sold us Mil Spec Grade 8 fasteners with certifications. There is a lot of counterfeit hardware out there that comes from Taiwan and others.
    Our bad hardware was destined for use to secure the cannon in the Abrams tank turret.

  3. #23
    Registered 2112's Avatar
    My Boats:
    04' Gladiator powered by Ford
    Join Date
    Dec 2003
    Socialist Republic of Washington State

    Re: Getting rid of stainless fasteners

    Well I odered some socket head ultra coated bolts.

    How can I tell where they are made and iff they are up to snuff?

    I got them from McMater-Carr as discussed above

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