No Dumb Questions?

[Emil Dular]

  None of my  hex keys
> fit the screw.  It's somewhere in size between .050 and  1/16."  Someone
on
> eBay is selling a set of Bristol spline wrenches which  supposedly
includes the
> size needed to remove the screw in question.

Hallicrafters and Collins were both fond of Bristol spline screws. A small
dose of very good penetrating oil and a LOT of patience are particularly
useful with steel setscrews corroded into 50 year old aluminum knobs.  The
avionics techs at work are particularly creative in their use of vocabulary
upon discovery of a Bristol spline stripped out by a pilot wielded allen
wrench.

Emil de WD4SCZ

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