What the heck?

Following ! :grin: I got 'em too and haven't a clue . :dunno:I thought they had something to do with riveting but I don't know .
 
OTmachine said:
Pilot for rivet hole in overlapping sheet metal?
Click to expand...
That would make sense maybe . The one guy I bought out worked at Martin Marietta his entire life . From now on , when people ask me what they are , they are the above ! ( whether they really are or not ) :grin:
 
OTmachine said:
Pilot for rivet hole in overlapping sheet metal?
Click to expand...

That is exactly what they are...

They are used to locate holes in new sheet metal... the lower side with the 'pin' goes under the sheet and the pin fits in the existing hole, then the upper drill bushing is aligned to the hole underneath...

Does that make sense?

-Bear
 
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