> Does anybody know the provenance of this bolt? It looks aerospacey.
    > The letters on the head are B30US8 and the other edge has a cursive
    > type 'A'
    > I was wondering about using them for mounting the motor.
    >
    > Chris Cosman
    >
    > Chris,
    > By the large radius under the head, it is most likely a structural
    > bolt.
    > If you have a spare, you could hardness test it. Probably way
    > stronger than
    > you need.
    > Larry

    > Its a nickel alloy 718 bolt, 1/2-20 UNJF-3A thread, with 220 ksi min
    > tensile and 125 kis min shear strength (very strong, well above grade
    > 8). If its used in high fatigue applications, it should be limited to
    > about 114 ksi.
    >
    > John Bell



   Thanks John.  Where did you get your info?

   Chris


How's that joke go about the engineer, the physicist, and the rubber ball?

Jeffrey Martin

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