5/16 Round Hole Cut Campbell Nibbler Bottom Punch Die Tooling punching Tool

Description

This die is coated in some type of oil protectant which is why it looks the way it does, it is not rust.
Item ...................... Qty.1 per bid, Bottom die for a Nibbler, but it is a standard 3/4" outside diameter so it may also fit a small Punch press or maybe a small ironworker or hand operated Whitney style punch.
Manufacturer ....... Campbell Nibbling Machine Co.  Wilson Mechanical Instrument Division Acco American Chain and Cable Company  Bridgepot CT. USA made in the US America
Size ....................... It says 5/16"-B on it, the actual hole size is .320"  No. 250 size B
Fits Campbell models 250, 430, 436, 530, 2524 and 2536
Diameter .............. 3/4" outside.  The thickness overall also measures 3/4" tall
Condition ............ New old stock