[Healeys] 4K5917 what's so special?

[Curtis Arndt]

Michael,

I have plenty of originals of these and as soon as I have a spare moment I
will send you detailed photos and measurements.  The ones you sent a
picture of are close, but my originals are NOT bright zinc plated.

As to why they are special, the only reason they should be listed as a part
number where if they where a "Whitworth" thread form, which they are
obviously not since they are sheet metal screws.  Very curious?

Cheers,

Curt


On Sun, Jul 21, 2013 at 5:54 AM, Michael Salter <michaelsalter at gmail.com>wrote:

> Here is one for the purists....
> The overdrive relays, there are 2, on a BN1 are secured to the heater duct
> by
> 4 self tapping screws part # 4K5917.
> According to the parts book that is the only place where screws with that
> part
> number are used on any model as far as I can tell.
> Does anyone know what is so special about these 4 screws, or for that
> matter
> know how they differ from others used generously throughout Healeys.
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