13
DISC RETAINER NUT AND TN QUICK CHANGE CENTER THREADED FIBRE DISCS
Fibre Discs can be held in place by a Disc Retainer Nut or by a pre-installed threaded center hub on the Fibre Disc itself (TN Quick Change System).
NOTE: Endure TN Quick Change Disc or Disc Retainer Nut are fully tightened onto the 5/8-11 spindle. 
NOTE: A Disc Retainer Nut is not required if a TN Quick Change disc is mounted.
Figure 16 Figure 17
Figure 18
Figure 14 Figure 15
3M PN 28442 Disc Pad Hub 
for Short Shaft Tools 3/8-24 
INT, 5/8-11 EXT
NOTE: 3/8-24 Tool 
Spindle Inside 5/8-11 
Hub Spindle
3M PN 02618 Disc Retainer Nut 5/16” x 5/8-11 INT Fibre Disc with TH Quick Change Center 5/8-11 INT
TN Quick Change Disc properly mounted Disc Retainer Nut properly mounted
Disc Pad Face Plate properly 
mounted to Hub 
NOTE: Ensure Face Plate is 
fully pressed onto Hub  
and that ribs are  
visible 
Face Plate
Hub
Ribs