Our 3M Disc Pad Hub enables operators to select face plates with four different levels of flexibility (soft, medium, hard and extra-hard). The disc pad hub holds a face plate firmly in position, and a center hole fiber disc is secured to the tool spindle with the retainer nut.
Disc pad hub and retainer nut has a M14-2 INT thread for use on grinders with M14-2 threaded spindle and can be used on all 3M Fiber Disc face plates. Use with 4-1/2 inch through 9 inch Fiber Discs with 7/8″/22mm center hole.

3M 19766, Utility Cloth Sheet 314D, 9 in x 11 in P240 J-weight, 7000000354
3M 26015, PPS Series 2.0 Adapter, Type S8, 12 mm Male, 1.0 mm Thread, 7100135931
3M 10115, Synthetic Steel Wool Pads, #3 Coarse, 7000051986
Insize 0120-IM24, INDUCTIVE MOISTURE METER, 0~100%, 6974029776588
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 19771, Utility Cloth Sheet 314D, 9 in x 11 in P100 J-weight, 7000021272
3M 22392, Roloc Disc 361F, 24 YF-weight, TR, 3 in, Die R300V, 7000045090 
