What you're actually buying
This is bulk-style straight silicone hose, not a molded shape with bends built in. 1.25" ID, sold as a 3ft stick so you cut it to length for whatever line you're chasing - heater hose, bypass hose, small coolant crossover lines on Kenworth T660/T680/T800 and Peterbilt 379/386/389 series trucks.
4-ply reinforcement means it's built for the heat and pressure cycling in a diesel cooling system, not the single-ply garden variety stuff. Silicone construction holds up better long-term against ozone cracking and heat soak in the engine bay than standard rubber, which matters on trucks that sit and idle a lot.
Because it's a straight cut length, fitment isn't about matching a curve - it's about ID size and length. As long as the old hose measures out to 1.25" ID, this stick works regardless of what system it's feeding.
Why these numbers cross and what to check
D10302364 lines up with 24820, H42-125, 561.09125, and EH22620 because they're all describing the same spec: straight silicone hose, 1.25" ID, 4-ply. Different brands, same basic hose stock - Gates, Dayco, and other hose houses all cut this size to sell into the heavy truck market.
The thing to actually check isn't the part number, it's the ID measurement on your old hose and the length you need cut. Silicone hose doesn't always crush down or expand the same as rubber, so measure the fitting or nipple it slides over before you assume 1.25" is your number - a hose that's slightly off ID either won't seat right or will leak under clamp pressure.
If you're pulling the old hose off, measure it with calipers rather than going by memory or a parts book guess. VIN lookups help narrow down which system on your specific truck uses this size, but the physical measurement is what confirms fit.
Ordering it from PartStop
We stock this at the Tacoma counter, so if you're local you can grab a stick today and cut it in the shop instead of waiting on a hose to ship in. If you're not close, we ship nationwide and this is a fast-moving cooling system item that doesn't sit in backorder purgatory.
Comes with our standard 6+ month warranty. It's aftermarket hose stock, so like anything else in cooling systems, confirm the ID and length against your old part or your VIN before you order - straight hose is forgiving on shape but not on size.
If you're doing a bigger cooling system job and need multiple lengths or diameters, call the counter - we can usually get you sorted on quantity pricing instead of ordering three separate sticks.
D10302364 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to D10302364. 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 |
|---|---|
| OE/Cross-Ref | 24820, H42-125, 561.09125, EH22620 |
Frequently asked questions
Does D10302364 fit my Kenworth T680?
Depends which coolant line you're replacing - T680s run more than one hose size through the cooling system. Measure the ID of the hose you're pulling, or pull the number off the old part if it's still legible, and match it to 1.25" before you order. VIN alone won't tell you which line uses this size.
Is this the same as the Gates 24820?
Same spec - straight silicone, 1.25" ID, 4-ply - so it crosses over for fit purposes. It's not a Gates part, it's aftermarket hose built to the same dimensions, so confirm your old hose measures out the same before assuming a straight swap.
Can I use this for heater hose instead of a coolant bypass line?
Yes, as long as the ID matches - silicone hose doesn't care what you call the line, it cares about diameter and pressure rating. Cut it to the length you need and clamp it the same way you would the factory hose.
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.