Zebra Printheads > GK420
Zebra GK420 Printheads
Restore print quality and keep operations running smoothly with a reliable Zebra GK420 printhead, designed for seamless use with both the Zebra GK420d and Zebra GK420t. Whether you’re searching for a GK420d printhead or GK420t printhead, our range includes genuine OEM (while stocks last) and cost-effective compatible options, all engineered to deliver sharp, consistent, and scannable labels.
DISCONTINUED ZEBRA PRINTHEAD PROMOTION
The OEM Zebra GK420 printheads are now officially discontinued. Meaning you will only be able to purchase official printheads while stocks last, our promotion offers significant discounts on brand new up-to-date Zebra Printers when upgrading from a model that has recently had it’s printhead discontinued.
Available Zebra GK420 Printheads
Zebra GK420d Printheads
Manufacturer
Part Number
Enquiry
Zebra
105934-037
Compatible
TPQS-GK420D-203-PH
Zebra GK420t Printheads
Manufacturer
Part Number
Enquiry
Compatible
TPQS-GK420T-203-PH
105934-038
Zebra
OEM VS COMPATIBLE ZEBRA GK420 PRINTHEADS EXPLAINED
The differences between OEM and Compatible printheads is quite simple, first of all now the GK420d and GK420t printheads are officially discontinued. OEM are no longer produced whereas compatible ones are still manufactured. Compatible printheads are extremely cost-effective and come with a reduced warranty but no reduction in quality compared to the originals. OEM printheads are also easily installable following the manufacturers instructions, some compatible printheads may require swapping the mounting bracket from the old to the new printhead.
Frequently Asked Questions – Zebra GK420 Printheads
What is a Zebra GK420 printhead?
A Zebra GK420 printhead is the key component responsible for applying heat to create the printed image on your labels. It directly impacts print quality, barcode readability, and overall printer performance in both the Zebra GK420d and Zebra GK420t.
Are GK420d printheads and GK420t printheads the same?
No — GK420d printheads and GK420t printheads are different parts and are not interchangeable. Each printer uses a specific printhead designed for its printing method, so it’s important to choose the correct Zebra GK420 printhead for your exact model.
What’s the difference between a GK420d printhead and a GK420t printhead?
The difference comes down to how the printers operate:
GK420d printhead – used in direct thermal printers (no ribbon)
GK420t printhead – used in thermal transfer printers (uses ribbon)
Because the technologies differ, the printheads are built differently to suit each process.
How do I know which Zebra GK420 printhead I need?
Check your printer model label or front casing:
If you have a GK420d, you need a GK420d printhead
If you have a GK420t, you need a GK420t printhead
If you’re unsure, your existing printhead part number can also be matched to ensure compatibility.
What resolution is a Zebra GK420 printhead?
Zebra GK420 printheads are 203 dpi, which is standard for shipping labels, barcodes, and general-purpose printing.
How do I know when my GK420 printhead needs replacing?
Typical signs include:
Faded or light print
Missing lines or white streaks
Poor barcode scans
Inconsistent print quality
If cleaning doesn’t fix the issue, replacing your GK420d printhead or GK420t printhead is usually the solution.
Should I choose OEM or compatible Zebra GK420 printheads?
OEM (genuine Zebra) – made by Zebra Technologies, offering guaranteed performance
Compatible – more cost-effective, suitable for most day-to-day applications
Both options can deliver excellent results depending on your budget and usage.
Can I install a Zebra GK420 printhead myself?
Yes, both GK420d printheads and GK420t printheads are designed for quick, tool-free installation, helping minimise downtime.