5 Ks are for all Singhs and Kaurs.

Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-sikhi-sikhism/749-5ks-and-sikh-woman.html
One of them is Kesh, i.e. unshorn hair. Dastaar is not a Kakar, but with evolution of Singhs, these became part of the uniform of the Khalsa. Certainly, we can look forward to more discussion about significance of dastaar by learned members here.

Regards.