A universal threading attachment for 7th position on an Acme Gridley 1-1/4" RB-8 screw machine has eight major assemblies:

1 - Drive Shaft Assembly AM-413702
2 - Clutch Operating Mechanism AM-413642
3 - Die Spindle Clutch Shaft Assembly AM-413682
4 - Die Spindle Shaft Assembly ZM-401470
5 - Die Holder and Sleeve Assembly AM-41273
6 - Operating Lever and Bracket Assembly ZM-40148
7 - Loose Parts Assembly ZM-40149
8 - Die Holder Housing and Way Assembly ZM-400800

Below are the individual replacement parts for each assembly that make up a 7th Position Universal Threading Attachment for an Acme Gridley 1-1/4" RB-8 screw machine: