This is a NOS Hardinge Super-Precision Standard  5/8 in. Davenport Collet,
with 1.048 in.x16RH thread.
Price $48.00 each (1 available)
For other Hardinge Davenport collets see:
http://www.kkdepot.com/Default.asp?keywords=davenport&action=allwordsearch
Dimension Information  
A 1.060" 
B 4.380" 
C 1.190" 
D 1.043" x 16 RH