Around 1960 I had occasion to work on instrumentation for the AEC. One
of the standard items in the parts bin was something known as an ESNA
Stop Nut. I think that ESNA was the manufacturer. They were the
forerunners of Nylocs.
Bud Krueger
52TD (Moss Nylocs on rods and mains)
see http://www.home.earthlink.net/~budkrueger/CrankIn.JPG
Bob Howard wrote:
> Nuts, one says. So I went into Machinery's Handbook to see what
>additional wisdom could be made to this discussion of nuts. Who among us
>who is not an engineer would ever think that in the index would be, under
>"Nuts":
> Acorn
> ANSI inch dimension:
> flat jam
> hex
> hex flat
> hex high
> hex slotted
> hex slotted high
> hex thick slotted
> jam
> machine screw
> square
> T-type (not, alas, MG T type in this ANSI category)
> Unified
> ANSI, metric
> heavy hex
> hex flange
> hex jam
> hex, styles 2 and 3
> prevailing torque, hex
> prevailing torque, hex flange
> slotted hex
> British Standard
> fine
> ISO metric
> metric
> Unified
> Whitworth
> crown, low and high
> eye nuts
> high, SAE
> slotted, high hex
> wing nuts
> wrench clearances (tables showing space to design around nuts)
> wrench openings (there are standards for this sort of thing)
>
> Nothing written about nylock nuts.
> There are 67 fine-print pages about nuts, though a few pages about
>washers are included in that count. Howabout a page on British Standard
>Double Coil Rectangular Section Spring Washers, Metric Series, Type D?
> Ever even seen one of these?
>
> Next time we wander into the hardware store to get a couple of nuts to
>refasten the rusty wheelbarrow, or to Moss to get a set of connecting rod
>nuts, we can appreciate the magnitude of the engineers' and
>manufacturers' task to get the right metal into the right shape, the
>right size, the right thread, the right finish, at an affordable price,
>into our hands so we can go back to our garage and drop the nut onto the
>floor where it rolls irretrievably under a cabinet.
>Bob
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