KP-55 Connector Long White 520K21

This white long-connector (Part #520K21) is a genuine replacement component for the KUPA KP-55 (and likely compatible KP-series) professional nail-drill handpiece. The connector serves as an internal coupling piece – possibly linking the motor or wiring harness to the front assembly – and is crafted in a white plastic material tailored for high-speed application.

Features

• OEM style fit for KUPA KP-55 handpiece and compatible models.

• Precise dimensions ensure correct fit and alignment: 2.87 mm triangular inner dimension, 5.48 mm outer diameter, length 14.11 mm.

• Constructed from white plastic suited for high-speed tool internals.
  

• Helps maintain proper internal connection (wiring or coupling) so that tool performance remains reliable and safe.

Installation Tips

• Ensure your existing connector matches the dimensions above (2.87 mm inner triangle, 5.48 mm OD, length 14.11 mm).

• Inspect whether your handpiece revision uses the same connector type — some variants may differ.
  

• Power off and unplug the handpiece before disassembly.

• Access the internal area where the connector resides (likely connecting wiring harness, motor to front assembly).

• Remove the old connector carefully, note how it was seated and oriented.

• Clean surrounding surfaces of any debris or lubrication residue.

• Insert the new 520K21 connector, ensuring it seats fully and aligns with associated wiring or parts.

• Reassemble the handpiece and test in no-load mode, looking for smooth operation and reliable connection.