Starrett No. 657 Series Magnetic Base with Attachments A/B/C/D/E/F
The 657AA is for use with all Starrett test, back-plunger, AGD, Dial and Miniature-Dial Indicators. Also accomodates similar indicators of other manufacturers. It includes the magnetic base and all attachments. The base has 3 precision ground magnetic contact points. It grips horizontally, vertically and upside down. Also includes the 657G Upright Base Post, 657S Snug, 657X Rod, 657Y Indicator Attachment and the PT18724 Snug.
Base dimensions: 1-15/16″ by 1-5/8″ by 1-7/8″
Upright base post: 3/8″ diameter by 7-7/16″
657X rod: 1/4″ diameter by 6″
657Y Indicator attachment: 1/4″ O.D. one end, other end threaded and fits lug backs of all AGD Indicators