SECTION II TM 5-4220-225-24P FIG. 16 HELMET LINER, DUCTS, SHELL AND AIR SUPPLY LINES (CONT) ADAPTER, MIXED GAS (2) 6-8 PACKING, PREFORMED (18) 6-9 SCREW-CAP (9)     6-10 NUT, PLAIN-HEX (9)     6-11 SCREW-CAP (75)     6-12 SCREW-CAP (18) 7-2 JOCKING HARNESS BRACKET (12) 7-3 SCREW-CAP (42) 7-4 LOWER BREECH RING (3) 7-5 NECK DAM ASSY (6) 7-6 LOWER LUG (2) 7-8 LOWER BREECH RING (3) 7-9 VIEWPORT RETAINER, RIGHT (1) 8-2 VIEWPORT, SIDE (6) 8-3 SEAL, SIDE VIEWPORT (18) 8-4 VIEWPORT RETAINER, TOP (1) 8-5 VIEWPORT, TOP (3) 8-6 SEAL, TOP VIEWPORT (9) 8-7 VIEWPORT RETAINER, LEFT (1) 8-8 VIEWPORT RETAINER, FRONT (1) 8-9 LENS, FRONT (3)     8-10 PACKING, PREFORMED, FRONT VIEWPORT (9)     8-11 GASKET (9) 9-2 AIR SUPPLY TUBING ASSY (1) 9-3 ADAPTER, TUBE (3) 9-4 PACKING, PREFORMED (18) 9-5 PACKING, PREFORMED (18) 9-6 REDUCER, TUBE (1) 9-8 RETAINING RING (6) 9-9 FILTER, PERFORATED METAL (6)     9-10 PACKING, PREFORMED (18)     9-11 VALVE (12)     9-12 PACKING, PREFORMED (9)     9-13 VALVE ASSY, AIR SUPPLY (1)     10-1 SETSCREW (6)     10-2 VALVE HANDLE, AIR SUPPLY (1)     10-3 PACKING GLAND NUT (1)     10-4 SPACER (3)     10-6 PACKING (9)     10-7 WASHER (3)     10-8 (1) ITEM NO. (2) SMR CODE (3) CAGEC (4) PART NO. (5) DESCRIPTION AND USABLE ON CODES (UOC) (6) QTY 16-2