The "HD K" usually refers to a vintage key blank manufactured by the British brand HD Hydro-Electric / HD Key Blanks under the "K" series or profile.
Waso-K Vintage Automotive & Petrol Caps:
This is the most common match for "WASO-K" blanks made by HD. It is widely used for classic car door locks, ignitions, and vintage Waso locking petrol caps, common on older Ford, Fiat, VW, Jaguar, and Vauxhall vehicles.
K Series Cylinder Key: An old stock, nickel-plated or brass blank manufactured by HD for classic residential rim locks or patio doors.
Classic British Leyland / Ford (Profile K / HD LF4): Used extensively for older British automotive applications.
K, GT6R, GT6RBP, FI6I, P11, K4P, 077, NE45P, FAKBP.
Information and illustrations are to the best of our knowledge and sourced from various sources. if you know differently, you are welcome to message us.