SECTION II TM 5-4220-227-24P (1) (2) (3) (4) (5) (6) ITEM SMR PART NO CODE    CAGEC NUMBER DESCRIPTION AND USABLE ON CODES  (UOC) QTY FIG.  51 BACK PRESSURE REGULATOR, 0₂ (CONT) 30 PAHZZ    13669 5952 ..SPRING ........................................................................ 1 31 13669 8074-2 ..BUTTON, SPRING ........................................................ 1 32 13669 8151-X81 ..BODY, REGULATOR .................................................... 1 PAHZZ    13669 389-1913 KIT, REPAIR, VALVE ...................................................... 1 PACKING, PREFORMED (1) 51-5 DIAPHRAGM (1) 51-7 PACKING, PREFORMED (1) 51-12 PACKING, PREFORMED (1) 51-15 SEAT, VALVE (1) 51-18 PACKING, PREFORMED (1) 51-22 RING, BACK-UP (1) 51-24 PACKING, PREFORMED (1) 51-25 PAHZZ    13669 389-1914 KIT, REPAIR, STANDARD .............................................. 1 PACKING, PREFORMED (1) 51-5 DIAPHRAGM (1) 51-7 CAP, STEM, VALVE (1) 51-9 WASHER (1) 51-10 SHAFT, FORCE (1) 51-11 PACKING, PREFORMED (1) 51-12 STEM, VALVE (1) 51-13 PACKING, PREFORMED (1) 51-15 PISTON, BALANCE (1) 51-16 SEAT, VALVE (1) 51-18 PACKING, PREFORMED (1) 51-22 RING, BACK-UP (1) 51-24 PACKING, PREFORMED (1) 51-25 END OF FIGURE 51-2