McMaster part numbers

[jimzcatz]

Does anyone know the part numbers for the 54 and 75mm external spiral thrust rings from McMaster?

 

[patelldp]

38mm: 91665A510
54mm: 91665A560
76mm: 91665A630

 

[djs]

I got 2-3 spare 54 if anyone wants them. Free if you pm me your address

 

[djs]

Also a general note- I don't know about the 75mm ones, but the 54s have to be ground down a little bit to fit in an aeropack retainer