SB1388
6" 1-1/2" x 8 TPI Back Plate
SB1390
8" 2-1/4" x 8 TPI Back Plate
SB1387
8" Blank Back Plate - Thick
SB1391
6-1/4" D1-3 Back Plate
SB1393
6-1/4" D1-4 Back Plate
SB1394
6-1/4" D1-4 Back Plate - Thick
SB1396
8-1/4" D1-4 Back Plate - Thick
