Home > Costco Grill Models > Costco 21129
Urban Islands 5-BURNER 304 STAINLESS STEEL, ROTISSERIE, BUILT-IN, N.G. (NATURAL GAS)
We recommend you measure your old parts and compare them to what we show below. This will help insure that you get the correct replacement parts for your Costco grill. This is best done with the old parts out of the grill. Verify your Costco grill model number.
Replacement grill parts for the Costco 21129
21129 Burners
44305-R 5-Pack Cast stainless steel burners.
- Replaces original Bull part# 44305
- Includes adjustable air shutter and screw in the venturi for adjusting air flow.
- Sold as a set of five (5) burners
Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.
Part Number: BULL-44305-R-X5
Material: stainless steel
Weight: 16.25
Dimensions: 16 1/4” x 2 7/8”
44305-R Cast stainless steel heavy-duty burner.
- Replaces original Bull part# 44305
- Includes adjustable air shutter and a screw in the venturi for adjusting air flow.
- Sold individually
Note: The original 44305 burner was a welded stainless steel burner. This replacement burner is a solid cast stainless burner, equivelant to OEM# 16516.
Part Number: BULL-44305-R
Material: cast stainless steel
Weight: 4.0
Dimensions: 16 1/4” x 2 7/8”
21129 Cooking Grates
16517-R 5-Pack Stainless steel cooking grates.
- SET OF FIVE (5)
- Premium grade 304 stainless steel
- Solid stainless rods
NOTE: Some models refer to this part as a
Cooking Grid.
This part replaces original BULL part# 16517.
Made in USA
Part Number: BULL-16517-R-X5
Material: stainless steel
Weight: 25.00
Dimensions:
- Front-To-Back: 19 1/2″
- Side-To_Side: 7 1/2″
16517-R Stainless steel cooking grate.
- Premium grade 304 stainless steel
- Solid stainless rods
- Sold individually
NOTE: Some models refer to this part as a
Cooking Grid.
This part replaces original BULL part# 16517.
Made in USA
Part Number: BULL-16517-R
Material: stainless steel
Weight: 5.00
Dimensions:
- Front-To-Back: 19 1/2″
- Side-To_Side: 7 1/2″
21129 Flame Tamers
16521-R 5-PACK Premium grade stainless steel flame tamers.
- Replacement for original Bull part# 16521.
- Fits Bull-made 4 and 5-Burner grills.
- One required for each burner.
- Sold as a set of five (5).
Made in USA
Replaces Costco factory part# BULL-16521-X5
Part Number: BULL-16521-R-X5
Material: stainless steel
Weight: 4.5
Dimensions:
- Front-To-Back: 17 5/8″
- Side-To_Side: 4 5/8″
16521-R Premium grade stainless steel flame tamer.
- Replacement for original Bull part# 16521.
- Fits Bull-made 4 and 5-Burner grills.
- SOLD INDIVIDUALLY.
Made in USA
Replaces Costco factory part# BULL-16521
Part Number: BULL-16521-R
Material: stainless steel
Weight: .90
Dimensions:
- Front-To-Back: 17 5/8″
- Side-To_Side: 4 5/8″
21129 Accessories
Bamboo Appetizer 7” Skewers - pack of eight. Limited to supplies on hand.
Part Number: 11040
Weight: 0.4
Dimensions: 7
$1.45
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
Material: stainless steel
Weight: 0.5
Dimensions: 8 1/4
Marinade Injector.For injecting flavor and marinades into meat. Disassembles for cleaning. Stainless steel injector tip. Graduated injection chamber.
Part Number: 14950
Material: stailess steel
Weight: 0.5
Deluxe non-stick flat spit basket. Attaches to 3/8” rotisserie rod with adjustable lid to secure food. 16”x7.5”x2”
WARNING: Before ordering, please verify that your rotisserie spit rod can fit through the .48 inch x .48 squared mounting holes. Our spit rod part numbers SR-5, SR-8 and SR-43 do fit.
Part Number: 24785
Weight: 1.5
Dimensions: 7 1/2” x 16”
Extra Wide Nylon Grill BrushBrush anywhere on the grill, deep into the corners, between the grids, and in broad strokes along the surface. The triangular shaped head of this brush is ideal for cleaning anywhere. 17 in. overall length with a 6. in. wide head. Nylon bristles, wire shaft and resin handle.
*For use on a cool grill.
Part Number: 77643
Weight: 0.5
Costco grill model 21129. Some parts not specific to a grill brand or model like regulators, posts, and heat indicators, which are listed in our repair parts section. Oct 15 2025
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