Bayonet spray gun 2.642-889.0
Kärcher documents this replacement for many modern K2-K5 electric machines. It uses proprietary Kärcher connections and is rated to 2000 PSI.
Home Kärcher Pressure Washer Guide
Brand compatibility hub
Kärcher Pressure Washer Guide
Kärcher is a strong compatibility ecosystem because current and legacy pressure washers use multiple connection families. The exact K-series generation, hose-reel configuration and universal-vs-proprietary interface can determine which hose, gun, wand and accessory fits.
Kärcher connection generation matters
Do not treat “K2-K5” as one permanent connection standard. Kärcher's current U.S. guidance says new 2026 K2-K5 FC models use universal pressure-washer connections, while many earlier K-series machines use Kärcher-specific gun/wand/hose interfaces.
For replacement components, use the Kärcher parts & compatibility guide.
Current Kärcher U.S. electric families
| Family | Current published pressure | Accessory connection | Compatibility note |
|---|---|---|---|
| K1 / K2 traditional family | 1600–1700 PSI | Kärcher on traditional models | Many older/current Power Control models use proprietary bayonet/accessory paths. |
| K3 | 1800 PSI | Kärcher on traditional models | Model-specific hose/gun charts matter. |
| K4 | 1900 PSI | Kärcher on traditional models | Water-cooled brushless-induction class in the current comparison. |
| K5 | 2000 PSI | Kärcher on traditional models | Do not assume hose-reel and non-reel guns interchange. |
| K1700–K2300PS Performance Series | 1700–2300 PSI | Universal | Separate from proprietary K-series accessory families. |
| 2026 K2–K5 FC models | Family-dependent | Universal | New connection generation; older K1-K5 accessory assumptions may not transfer. |
The 2026 FC change is exactly the kind of generation boundary this site should preserve
Kärcher's current electric-pressure-washer page explicitly says the new 2026 K2-K5 FC models feature universal pressure-washer connections. Its eco!Booster 3000 page separately says the universal 1/4-inch-QC accessory is compatible with current universal models and not compatible with 2025-and-earlier K1-K5 models.
That means a broad retailer statement such as “fits K5” is not enough without model/generation context.
Kärcher gas pressure washers use another connection path
The current U.S. gas comparison lists models such as G 3500 QHT, G 3100 XH, G 3200 Q and G 2900 E with M22 threaded accessory connections and standard quick-connect spray nozzles. That is materially different from a traditional K-series bayonet system.
Use the fittings guide and nozzle guide after confirming the exact gas model.
Spray-gun compatibility is model-specific, not just K-series-specific
Bayonet gun + hose kit 2.644-343.0
Documented for K2-K5 electric models without hose reels, with explicit exclusions for hose-reel machines, K1700-K2000-style universal machines, gas washers and other brands.
VersaGRIP / standard M22 guns
Kärcher also sells guns for M22 or quick-connect pressure-washer systems, illustrating that the brand itself spans proprietary and standard interfaces.
Model compatibility charts
Kärcher publishes long gun and hose compatibility matrices. Use those model rows as the primary evidence instead of inferring from appearance.
Manufacturer sources
- Kärcher — current electric pressure washers and connection comparison
- Kärcher — current gas pressure-washer comparison
- Kärcher — spray-gun compatibility charts
- Kärcher — high-pressure hose compatibility finder
- Kärcher — Bayonet Spray Gun 2.642-889.0
- Kärcher — eco!Booster 3000 / universal-connection compatibility
Sources reviewed August 28, 2026. PressureWasherMatch.com is independent and is not affiliated with or endorsed by Kärcher.
Kärcher Pressure Washers · Kärcher Parts · Hose Guide · Fittings · Spray Gun · Wand / Lance · Nozzles · How We Verify
Frequently asked questions
Are all Karcher K2 to K5 accessories compatible with each other?
No. Kärcher currently documents proprietary K-series accessory connections on many K2-K5 models, while new 2026 K2-K5 FC models use universal pressure-washer connections. Hose reels and older generations create additional exceptions. Use the exact model and compatibility chart.
What changed on the 2026 Karcher K2 to K5 FC models?
Kärcher’s current U.S. electric-pressure-washer page states that the 2026 K2-K5 FC models now feature universal pressure-washer connections. This is a significant change from 2025-and-earlier K1-K5 accessory compatibility.
Are Karcher gas pressure washers proprietary?
Current Kärcher U.S. gas-pressure-washer comparison data lists M22 threaded accessory connections and standard quick-connect spray nozzles on the shown residential gas models. Verify the exact model because legacy products can differ.
Can I use a Karcher bayonet spray gun on K1700 to K2300PS models?
Do not assume so. Kärcher’s bayonet gun/hose kit explicitly excludes the K1700-K2000-style universal family in its compatibility notes, while the Performance Series is listed with universal accessory connections. Use the spray-gun compatibility chart for the exact model.
Can I use universal 1/4-inch quick-connect accessories on an older Karcher K5?
Not without a documented adapter or compatible gun/wand. Kärcher’s eco!Booster 3000 specifically states that its universal 1/4-inch quick connect is not compatible with 2025-and-earlier K1-K5 models.
How do I find the correct Karcher replacement hose?
Use Kärcher’s model-by-model high-pressure hose finder. The manufacturer publishes a compatibility matrix that maps specific K-series and other models to exact replacement and extension hose kits.