AM-412750 item 22 - Spring

This National Acme replacement screw part number 3973 (item 6-XA) is used in 4th Position Die Slide Assembly AM-412750.   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 - 4th Position
Acme Gridley 1-1/4" RB-8 Universal Threading Attachment - 4th Position