Manual lens adapter ring PK/DA-NIK Z - K&F CONCEPT
Amazon.com : Fotasy PK Lens to Nikkor Z Mount Adapter, K Mount to Z Mount Adapter, PK Z Mount, fits Pentax PK Lens, Compatible with Nikon Z Mount Mirrorless Camera Z30 Z50
K&F Concept Pentax K Lenses to Fuji X Mount Camera Adapter PK-FX – Camera Commons
LENS ADAPTERS PK/DA-NIK Z Camera Mount Adapter - K&F Concept
Vello Pentax K Lens to Nikon F-Mount Camera Lens Adapter
Pentax K AF Mount (PKAF) DSLR Lens to Nikon F Mount SLR Camera Body Adapter – Fotodiox, Inc. USA
Lens Adapter - Pentax K Mount Lenses to Nikon 1-Series Cameras – Fotodiox, Inc. USA