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

(Page 9) End item NSN parts page 9 of 39
Part Number
NSN
NIIN
015-7377 O-ring
006185361
015-90010-58 Pipe Bushing
002783167
015120800 Annular Ball Bearing
001091179
0151258-00 Annular Ball Bearing
005165490
0151335-00 Bearing Ball
001006153
01527-6S Tube Elbow
007192618
0156279-00 Lubrication Fitting
000504208
0156283-00 Lubrication Fitting
001720034
0156287-00 Lubrication Fitting
000504203
016 O-ring
006843419
016-4087 O-ring
006843419
016-7757 O-ring
010431419
0160-0374 Electrolytic Fixed Capacitor
001135475
0160-3334 Ceramic Dielectr Fixed Capacitor
001135488
0164-10 Pipe To Boss Straight Adapter
001969580
0170006 Annular Ball Bearing
005165490
01705-0418-10 O-ring
005840266
018-001480 Electrical Contact
002393338
018-0146-040 O-ring
002483843
018-19457 O-ring
006180799
Page: 9 ...

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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