United States K-class submarine

	USS K-1 underway in 1916
Class overview
Name	K class
Builders	Electric Boat (design); Fore River Shipyard, Quincy, Massachusetts (K-1, K-2, K-5, & K-6); Union Iron Works, San Francisco, California (K-3, K-7, & K-8); The Moran Company, Seattle, Washington (K-4);
Operators	United States Navy
Preceded by	H class
Succeeded by	L class
Built	1912–1914
In commission	1914–1923
Completed	8
Retired	8
General characteristics
Type	Submarine
Displacement	392 long tons (398 t) surfaced; 521 long tons (529 t) submerged;
Length	153 ft 7 in (46.81 m)
Beam	16 ft 8 in (5.08 m)
Draft	13 ft 1 in (3.99 m)
Installed power	950 hp (710 kW) (diesel engines); 340 hp (250 kW) (electric motors);
Propulsion	2 × NELSECO diesel engines; 2 × Electro Dynamic electric motors; 2 × 60-cell batteries; 2 × Propellers;
Speed	14 kn (26 km/h; 16 mph) surfaced; 10.5 kn (19.4 km/h; 12.1 mph) submerged;
Range	4,500 nmi (8,300 km; 5,200 mi) at 10 kn (19 km/h; 12 mph) surfaced; 120 nmi (220 km; 140 mi) at 5 kn (9.3 km/h; 5.8 mph) submerged;
Test depth	200 ft (61 m)
Capacity	18,126 US gal (68,610 L; 15,093 imp gal) fuel
Complement	2 officers; 26 enlisted;
Armament	4 × 18 inch (450 mm) bow torpedo tubes (8 torpedoes)

The K-class submarines were a class of eight submarines of the United States Navy, serving between 1914 and 1923, including World War I. They were designed by Electric Boat and were built by other yards under subcontracts. K-1, K-2, K-5, and K-6 were built by Fore River Shipyard, in Quincy, Massachusetts, K-3, K-7, and K-8 by Union Iron Works, in San Francisco, California, and K-4 by The Moran Company, in Seattle, Washington. All were decommissioned in 1923, and scrapped in 1931, to comply with the limits of the London Naval Treaty.