Zebra GK420/GX420 203dpi Direct Thermal Printhead 105934-037 | GK420D GX430D

This is a 203 dpi direct-thermal printhead designed for Zebra GK420D and GX420D printers. It is not compatible with GK420T/GX420T models that use thermal transfer printheads. Use the correct printhead to maintain print quality and avoid misprints. If you’re replacing a worn printhead, this part delivers reliable performance for barcode labels and receipts in small-medium print runs. For best results, install per the printer’s service manual and follow ESD safety precautions during handling.

Item specifics

•     Brand: Zebra (OEM compatible via 105934-037)
•     Model: GK420D / GX420D (Direct Thermal) printhead
•     Part number: 105934-037
•     Printer compatibility: Zebra GK420D, GX420D (not for GK420T/GX420T/Thermal Transfer)
•     Print technology: Direct thermal
•     Print resolution: 203 dpi (8 dots/mm)
•     Media type: Labels (direct thermal)
•     Temperature range: See manufacturer guidelines
•     Quantity: 1 printhead per package
•     Condition: New

What’s included

•    1 x 105934-037 Zebra GK420/GX420 printhead
•    (Optional) 1 x protective foam/shipping insert

Key selling points

•     Direct thermal, 203 dpi – sharp barcodes and text on most label stock
•     OEM-compatible part number 105934-037 – widely referenced in Zebra GK420 family documentation
•     Compact form factor designed for GK420D/GX420D printers
•     Economical option for maintenance or repair of GK420 series label printers
•     Clear indicators (printhead age, coating integrity) to assess suitability before installation

Benefits to buyer

•     Restores print quality and consistency on direct-thermal labels
•     Reduces downtime by providing a straightforward replacement part
•     Compatible with widely used Zebra GK420D/GX420D printers, enabling quick servicing

Compatibility notes (important)

•     Do not use with GK420T or GX420T printers (203 dpi printhead differences exist for thermal transfer models).
•     Verify your printer model and part number before purchase to ensure compatibility.

Usage and installation tips

•     Handle printheads with clean, dry hands or anti-static gloves to prevent residue contamination.
•     Align the printhead carefully to avoid skewed prints and ensure even pressure during installation.
•     Calibrate the printer after installation following Zebra’s guidance for head height and print settings.
•     Test with a few labels and a barcode to confirm print quality before running production jobs.

Shipping and handling

    Ships from established electronics/printhead suppliers

    Packaging typically includes protective materials to prevent impact damage during transit

    We offer tracking and insured shipping options

Warranty and returns

•     We offer a 30–90 day warranty on printheads, with returns accepted if the item is DOA or not as described
•     Check seller-specific terms for defect handling and restocking fees