> 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


HI Chris,
That info comes from the Boeing specification sheet for that bolt.
Remember that in order to be absolutely sure of those numbers, the a/c
manufacturers require certification documentation to accompany the
bolts. ALso, the part number doesnt include any info on coatings or lube
on the bolt so its hard to determine the corrosion resistance and heat
capability of the bolt. Since it is stamped with the part number it has,
it appears to be a nickel base alloy, thus high heat capability is implied.
Good luck on your project!
Best,
John

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