ZM-40171 item 28 - Jam Nut

This National Acme replacement jam nut part number 51188 is used in Operating Lever and Bracket Assembly ZM-40171.   View any of the following layout assembly drawings of the complete multispindle attachment for reference.  This replacement part may be used in attachment assemblies that fit numerous size Acme Gridley multi spindle screw machines and/or positions.

Acme Gridley 1-1/4" RB-8 Reaming Attachment - 3rd Position
Acme Gridley 1-1/4" RB-8 Universal Threading Attachment - 3rd Position