Thermos 21003 Grill Parts

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Highest quality replacement parts for your Thermos 21003 - Free USA shipping $49 or more* - No Sales Tax*

 

Thermos 21003 owners manual and diagrams
Diagrams & owners manual not available for grill model# 21003. If you have a manual you're willing to share, please click here to send us an email with the attached manual. Thank You!

 


Replacement grill parts for Thermos model: 21003
This page shows all of the parts we know fit model Thermos 21003. If the part you need is not shown below, try clicking the appropriate category button on the right side of the page. For example, if your looking for a burner and there are none here, click the burner button to see all the burners we have for Thermos grills. You will need to know the dimensions of your existing grids to help you find the right part.

To get the correct Thermos 21003 BBQ parts
  • You should measure your existing parts and compare them to what we show here. This is best done with them removed from the grill.
  • Verify your Thermos model number by checking the CSA appliance tag on your grill to make sure you have the correct model number. Do not rely solely on the owners manual as these are frequently mixed up at retail stores when the grills are assembled. You'd be surprised at how many folks have the wrong owners manual.
 


21003 Venturis

Single Gasket Kit Economy Burners

Part Number: SHK4
Weight: 0.01

$4.16
 

Straight adjustable single venturi from 5 1/8” to 7”. Includes all necessary gaskets and screws/nuts.

Part Number: 70301
Material: zinc plated steel
Weight: 0.5

$26.10
 

 





21003 Cooking Grids

Porcelain steel cooking grid for Thermos model 21003. Porcelain enameled, glossy finish. Sold individually.

Part Number: 50101
Dimension Front-to-Back: 12”
Dimension Side-to-Side: 18 1/2”
Material: porcelain steel wire
Weight: 3.9

$28.22
 

 





21003 Rock/Briquette Grates

Rock grate for holding lava rock or ceramic briquettes.

Part Number: BG-1
Dimension Front-to-Back: 11 1/4”
Dimension Side-to-Side: 18 1/4”
Material: carbon steel
Weight: 3.3

$31.63
 

 





21003 Heat Plates

Heat Plate/ Flame Tamer not known for Thermos model 21003. Our parts information for this grill model is incomplete, and we really don't know with certainty which heat plate fits this model. It may be that we have the part but don't show it here due to data or other error.

If you know the original OEM part number, try searching for it in the search box at the top of this page.

You can also browse through all of the heat plates we carry for your brand grill. If we don't have the exact fit for your grill, we may have a suitable replacement part. Measure your existing part so you'll know exactly what size is needed.

If you have this grill model and know the number and dimensions of your original heat plates, click here to send an email to our GrillDr that includes this information. We greatly appreciate your help.

Part Number: HP-DUMMY
Weight: 1.0
 





21003 Warming Racks

Universal warming rack. For use on grills with at least 22” inside dimension.

Part Number: AP-6A
Dimensions: 6” x 21 1/2”
Material: Chrome steel
Weight: 1.3

$23.33
 

 





21003 Accessories

Natural lava rock processed and screened for uniformity. 7 lb. bag is enough for all full sized grills. Click the photo to find easy steps for installing lava rocks.

Part Number: 45887
Material: pummise
Weight: 7.0

$24.95
 

Cedar grilling planks adds a delicious wood-smoke flavor to foods grilled on them. Great for salmon! 11 7/8” x 5 1/4” x 5/16” 100% natural cedar. Two planks per pack.

Part Number: 00281
Dimensions: 11 7/8
Weight: .45

$12.67
 

Meat Claws.

Shredding pork, chicken, or beef has never been easier. Spare the fork these meat shedding claws can hold with the larger outside tines and shred fine strands of meat with the smaller inside tines. Crafted of stainless steel with an easy to use grip that can be held multiple ways.
Each claw is 8.25 in. in overall length.



Part Number: 44070
Dimensions: 8 1/4
Material: stainless steel
Weight: 0.5

$16.16
 

Universal 6 piece chrome plated skewer set. Designed so food does not rotate. Great for kabobs! 19 1/2” long.

Part Number: SR-7B
Dimensions: 19 1/2
Material: chrome steel
Weight: 1.0

$14.27
 

Basting brush with angled oak handle. 18” overall length.

Part Number: BB-5
Dimensions: 18
Weight: 0.8

$9.36
 

Roast holder. This holder is an ideal way to cook and also carry a roast from the grill. Made of heavy, bright nickel-plated steel, 15 1/4” L x 10 1/2” W.

Part Number: RR-3
Dimensions: 19 1/2
Weight: 1.0

$13.71
 

Scrub brushes. Plastic grill scrubber. Cleans all types of cooking grids. Plastic grip handle.

Part Number: WB-7
Dimensions: 6” x 3 1/2”
Weight: 0.2

$5.23
 

 



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Thermos grill 21003 - Tuesday, May 12 2026

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*Orders for Thermos grill model 21003 $49 and over ship free to the lower 48 states.
See shipping policy below for more info.


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Build Date: May 12 2026