HNLMS Van Speijk (K3, later F805) was a sloop, designed in the late 1930s to replace the aging s of the Royal Netherlands Navy. Incomplete at the start of the German invasion of the Netherlands and not yet launched, K3 was found undamaged by the German forces. The Kriegsmarine ordered her completion, then commissioned her for service in Norwegian and German home waters.
After the war she was repaired at the Rijkswerf at Amsterdam, then entered Dutch service as the frigate Van Speijk (F805). She mainly served in the Dutch West Indies until she was scrapped in 1960.
The K-class ships were long, with a beam of and a draught of at deep load. They displaced was at normal load, which increased to at deep load. A pair of diesel engines each drove a single propeller shaft. The engines were rated at which gave the ships a speed of . They carried up to of fuel oil and had a complement of 106 officers and ratings.