What You're Looking At
This is a straight coolant hose, not molded, so it's not fighting a specific bend radius - just 2" ID silicone, 4-ply reinforced, cut off a 3ft stick. That's the point of a stick hose: you trim it to the exact run length you need between the rad, charge air cooler, or surge tank instead of ordering ten different molded shapes.
It shows up on Kenworth and Peterbilt trucks (the common W900, T660/680, 579 cooling setups) and on Navistar/International builds using the same 2" straight coolant runs. F02505S352 is the aftermarket part number we stock it under - D10302456 is the OEM/mfr reference it's built to replace.
4-ply silicone means it handles the heat cycling and coolant additive exposure better than a straight rubber hose, and it won't go hard and crack after a couple summers sitting in an engine bay running 210+ degrees.
On the Numbers - What Actually Matters
D10302456 is the number you'll find stamped on the OEM part or listed in the parts book. Flexfab H42-200, Thermotec 561.09200, and Dayco 24832 all cross to that same spec - 2" ID, 4-ply, straight - which is why they interchange. Different label, same hose geometry and wall construction.
Since this is a straight stick and not a molded piece, the main thing to verify isn't bend angle or leg length - it's ID and wall thickness. Confirm the old hose measures 2" inside diameter and matches your total run length once you account for how far it slides onto the fittings on each end. Silicone hoses need enough overlap on the barb or pipe to seal right, so don't cut it flush to your bare minimum length - leave some extra.
If your old hose has any part number stamped or molded into it, that's your fastest confirm. No number visible? Pull the chassis VIN and give us a call or check it against your cooling system diagram - straight hose ID is easy to get wrong by eyeballing it, especially with clamps already squeezing the ends down.
Ordering From Us
We keep this one in stock in Tacoma, so if you're local and need it same-day, it's usually sitting on the shelf - call ahead if you're driving over to make sure we haven't sold down. Ships nationwide too if you're not close enough to walk in.
Standard 6+ month warranty on it. Silicone hose is straightforward stuff, but if it fails from a manufacturing issue and not a install problem (wrong length, bad clamp, contamination), we'll make it right.
One thing worth mentioning: because it's a 3ft stick, you're buying material to cut, not a pre-formed exact-fit hose. Measure twice before you cut - we can't take back a piece that's already been trimmed.
D10302456 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to D10302456. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Flexfab | H42-200 |
| Thermotec | 561.09200 |
| Dayco | 24832 |
Frequently asked questions
Does D10302456 fit my Kenworth T680?
Depends on the year and engine - cooling system layouts changed across model years. Surest way to confirm is pull the number off your old hose or check your VIN against the parts diagram. Straight 2" ID hose is common across a lot of KW builds but don't assume without checking.
Is this the same as the Dayco 24832?
Same spec - 2" ID, 4-ply, straight silicone construction - so it interchanges. Different manufacturer stamping it, but the hose itself is built to the same dimensions. Confirm your old hose measures 2" ID before ordering either one.
Why does this come as a 3ft stick instead of a specific length?
Straight hose runs vary enough between trucks and mounting points that a stick length gives you flexibility to cut to your exact run instead of guessing at a fixed size. Just make sure you leave enough extra to get proper overlap onto the barbs on both ends.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.