Gun Drill Bushings Type GDB

Acme Type GDB Bushings are thru-hardened to 61-65 RC and ground concentric within .0002″ T.I.R.

The head is undercut and ground square to the outside diameter. The face is square to the inside diameter within .0002″ T.I.R. Type GDB Bushings are manufactured from semi-finished inventory for quick delivery.

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All Dimensions are in inches.