Figure  C–6. Drain  Assembly Model  53029A–20 (1) (2) (3) (4) (5) (6) (7) (8) ILLUSTRATION DESCRIPTION QTY (a) (b) NAT 10NAL INC FIG ITEM SMR STOCK PART IN NO NO CODE NUMBER FSCM NUMBER USABLE  ON  CODE U/M UNIT C-6 Group 05 Drain   Assembly C-6 1 5330-00-291-3085 96906 MS29513–250 O-Ring Ea 1 C-6 2 74897 ST20F1969–02 Drain  Fitting  With  Plug, Ea 1 Chain  and  Screw C-6 3 5305-00-225-3839 96906 MS90725–8 Bolt, Hex-Hal,  1/4–In. Ea 8 C-6 4 5310-00-809-4058 96906 MS27183-9 Washer,  Flat,  1/4-In. Ea 8 C-10 Change 1