Mk-45 5-in./54 Cal Gun Parts

(Page 10) End item NSN parts page 10 of 39
Part Number
NSN
NIIN
018-7377 O-ring
006180799
018-7507 O-ring
006180799
0180-0962 Electrolytic Fixed Capacitor
004950042
0180-1029 Electrolytic Fixed Capacitor
004950042
0180-1794 Electrolytic Fixed Capacitor
012309263
0184-0374 Electrolytic Fixed Capacitor
001135475
01847-026 Hexagon Head Cap Screw
002253843
0187-3-4X1-2 Pipe Bushing
002783167
019-00001-449 Pipe Plug
009541281
019-003675-279 Transistor
010059891
019-004835-284 Diode Semiconductor Device
001463870
019-0818-000 Packing Assembly
002022589
01G009701-3 Incandescent Lamp
007637744
01G009701-73 Electrical Receptacle Connector
004905220
01G009701-92 Lug Terminal
005574344
01G009712-81 Lug Terminal
005571629
01SP4 Pipe Plug
009541281
02-54-0010 Lamp Ballast
002952735
02-61-3008 Cartridge Fuse
002959063
020-N11 O-ring
005857723
Page: 10 ...

Gun, 5-in./54 Cal, Mk-45

Picture of Mk-45  5-in./54 Cal Gun

1971-present

The 5-inch/54 caliber (Mk 45) lightweight gun is a modern U.S. naval artillery gun mount consisting of a 127 mm (5 in) L54 Mark 19 gun on the Mark 45 mount.

The gun mount features an automatic loader with a capacity of 20 rounds. These can be fired under full automatic control, taking a little over a minute to exhaust those rounds at maximum fire rate. For sustained use, the gun mount would be occupied by a six-man crew (gun captain, panel operator, and four ammunition loaders) below deck to keep the gun continuously supplied with ammunition.

Development started in the 1960s as a replacement for the 5-inch/54 caliber Mark 42 gun system with a new, lighter, and easier to maintain gun mounting. In United States Navy use, the Mark 45 is used with either the Mk 86 Gun Fire Control System or the Mk 160 Gun Computing System. Since before World War II, 127 mm (5 inches) has been the standard gun caliber for U.S. Naval ships. Its rate of fire is lower than the British 4.5 in (114 mm) gun, but it fires a heavier 127 mm (5-inch) shell which carries a larger burst charge that increases its per-shell effectiveness against aircraft.

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