Can anyone help to identify these?

[northernlights**]

Do these look familiar to anyone? To give you an idea of the size, the green one is about 4 1/2" long and the metal prongs are 5/8" long. I have many of them with assorted colored bases and varied length of prongs. These are from the estate of a machinist who also worked with electronics. Any help anyone can give me would be greatly appreciated!

[eburtonlab · Accepted solution]

@northernlights** 

Those look like "card edge connectors" that allow a circuit board to be inserted and make electrical contact:

https://www.google.com/search?client=firefox-b-1-d&biw=1540&bih=821&tbm=isch&sa=1&ei=hbM0XZj8O7K3gge...

The standard ones I am familiar with have short solder lugs or short pins for soldering to a PC board. Not sure about the ones with the longer rounded tails, though -- they look like they are specialized for a particular purpose that is not readily apparent to me.

[northernlights**]

eburtonlab -That's it- Thank you!