Inline Air Heaters | McMaster-Carr

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About Heating Elements

Compare insertion heaters for metal parts vs. immersion heaters for liquids. Then choose the right wattage for your application.

Finned Tubular Heating Elements for Duct, Ovens, and Dryers


M-Shape	Straight	U-Shape

These tubular heating elements minimize the risk of sparks and fire from combustible particles in the flow stream, making them a safer choice than open coil heating elements. Finned for increased surface area, they quickly dissipate heat in air and inert gas heating systems such as duct heating elements and convection ovens. Their sheath, fins, and fittings are made of stainless steel, which resists heat and corrosion better than steel. These heating elements require a temperature switch or control (sold separately) to regulate output.

Welded on One End—Heating elements with end fittings welded on one end have one fitting permanently welded for a secure connection, while the other fitting is loose to create room for tube expansion during heating. The extra space helps prevent damage.

						Fin			Heating Element		Screw Terminal
	Wattage, W	Watt Density, W/in²	Current, amp	Overall Lg.	Max. Heat Output, ° F	Lg.	Dia.	Material	Lg.	Material	Thread Size	Lg.		Each
120V AC, Single Phase







				Straight—Welded on One End

				1,000	60	8.33	23 1/2"	1,200	16 1/2"	15/16"	Stainless Steel	20"	304 Stainless Steel	8-32	1.125"	7085N13	0000000




						U-Shape—Welded on Both Ends

						1,000	60	8.33	12"	1,200	8 3/4"	15/16"	Stainless Steel	10 1/4"	304 Stainless Steel	8-32	1.125"	7085N42	000000




								M-Shape—Welded on Both Ends

								1,500	60	12.5	9 1/2"	1,200	6 1/4"	15/16"	Stainless Steel	7 3/4"	304 Stainless Steel	8-32	1.125"	7085N72	000000


								240V AC, Single Phase







												Straight—Welded on One End

												2,000	80	8.33	32 1/4"	1,200	25"	1 3/16"	Stainless Steel	28 1/4"	304 Stainless Steel	10-32	1.125"	7085N18	000000




														M-Shape—Welded on Both Ends

														3,000	80	12.5	12 1/4"	1,200	9"	1 3/16"	Stainless Steel	10 1/4"	304 Stainless Steel	10-32	1.125"	7085N77	000000


														4,000	80	16.67	15 1/4"	1,200	12"	1 3/16"	Stainless Steel	13 1/4"	304 Stainless Steel	10-32	1.125"	7085N78	000000


														480V AC, Single Phase







																		U-Shape—Welded on Both Ends

																		1,000	80	2.08	9 3/4"	1,200	6 1/2"	1 3/16"	Stainless Steel	7 3/4"	304 Stainless Steel	10-32	1.125"	7085N54	000000


																		2,000	80	4.17	15 3/4"	1,200	12 1/2"	1 3/16"	Stainless Steel	13 3/4"	304 Stainless Steel	10-32	1.125"	7085N56	000000
																		3,000	80	6.25	22 1/4"	1,200	19"	1 3/16"	Stainless Steel	20 1/4"	304 Stainless Steel	10-32	1.125"	7085N57	000000
4,000																		80	8.33	28 1/4"	1,200	25"	1 3/16"	Stainless Steel	26 1/4"	304 Stainless Steel	10-32	1.125"	7085N58	000000




		M-Shape—Welded on Both Ends

		3,000	80															6.25	12 1/4"	1,200	9"	1 3/16"	Stainless Steel	10 1/4"	304 Stainless Steel	10-32	1.125"	7085N85	000000


		4,000	80															8.33	15 1/4"	1,200	12"	1 3/16"	Stainless Steel	13 1/4"	304 Stainless Steel	10-32	1.125"	7085N86	000000
		6,000	80															12.5	21 1/4"	1,200	18"	1 3/16"	Stainless Steel	19 1/4"	304 Stainless Steel	10-32	1.125"	7085N88	000000
		7,000	80															14.58	24 1/4"	1,200	21"	1 3/16"	Stainless Steel	22 1/4"	304 Stainless Steel	10-32	1.125"	7085N89	000000

Finned Strip Heating Elements for Duct, Ovens, and Dryers

These heating elements have a large surface area to quickly dissipate heat in air and inert gas heating systems used in ducts, ovens, and dryers. They have a 304 stainless steel heating element that resists corrosion and moisture. All heating elements require a temperature switch or controller (sold separately) to regulate heat output.

						Fin				Heating Element		Screw Terminal		Mounting
	Wattage, W	Watt Density, W/in²	Current, amp	Overall Lg.	Max. Heat Output, ° F	Lg.	Wd.	Ht.	Material	Lg.	Material	Thread Size	Ht.	Fasteners Included	Hole Ctr.-to-Ctr.		Each
120V AC, Single Phase







				Split Screw Terminal

				350	18	2.9	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K591	000000


				500	34	4.2	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K411	00000
				725	45	6	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K421	00000
				750	28	6.3	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K361	00000
				900	40	7.5	12"	1,200	7 1/4"	2"	1 3/8"	Nickel-Plated Steel	7 1/4"	304 Stainless Steel	10-32	5/8"	No	11"	3575K431	00000
				1,100	37	9.2	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K441	00000
				1,250	37	10.4	15 1/4"	1,200	10 1/2"	2"	1 3/8"	Nickel-Plated Steel	10 1/2"	304 Stainless Steel	10-32	5/8"	No	14 1/4"	3575K451	00000
				1,550	38	12.9	17 7/8"	1,200	13 1/8"	2"	1 3/8"	Nickel-Plated Steel	13 1/8"	304 Stainless Steel	10-32	5/8"	No	16 7/8"	3575K461	000000
				1,700	34	14.2	19 1/2"	1,200	14 3/4"	2"	1 3/8"	Nickel-Plated Steel	14 3/4"	304 Stainless Steel	10-32	5/8"	No	18 1/2"	3575K471	000000
				1,900	36	15.8	21"	1,200	16 1/4"	2"	1 3/8"	Nickel-Plated Steel	16 1/4"	304 Stainless Steel	10-32	5/8"	No	20"	3575K481	000000




						Inline Screw Terminal

						350	18	2.9	10 1/2"	1,200	6 1/2"	2"	1 3/8"	Nickel-Plated Steel	6 1/2"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K592	00000


						500	21	4.2	10 1/2"	1,200	6 1/2"	2"	1 3/8"	Nickel-Plated Steel	6 1/2"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K11	00000
						725	31	6	10 1/2"	1,200	6 1/2"	2"	1 3/8"	Nickel-Plated Steel	6 1/2"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K424	00000
						750	21	6.3	14"	1,200	10"	2"	1 3/8"	Nickel-Plated Steel	10"	304 Stainless Steel	10-32	5/8"	No	13"	3575K364	00000
						900	31	7.5	12"	1,200	8"	2"	1 3/8"	Nickel-Plated Steel	8"	304 Stainless Steel	10-32	5/8"	No	11"	3575K12	00000
						1,100	31	9.2	14"	1,200	10"	2"	1 3/8"	Nickel-Plated Steel	10"	304 Stainless Steel	10-32	5/8"	No	13"	3575K13	00000
						1,250	31	10.4	15 1/4"	1,200	11 1/4"	2"	1 3/8"	Nickel-Plated Steel	11 1/4"	304 Stainless Steel	10-32	5/8"	No	14 1/4"	3575K14	00000
						1,550	31	12.9	17 7/8"	1,200	13 7/8"	2"	1 3/8"	Nickel-Plated Steel	13 7/8"	304 Stainless Steel	10-32	5/8"	No	16 7/8"	3575K15	000000
						1,700	31	14.2	19 1/2"	1,200	15 1/2"	2"	1 3/8"	Nickel-Plated Steel	15 1/2"	304 Stainless Steel	10-32	5/8"	No	18 1/2"	3575K16	000000
						1,900	31	15.8	21"	1,200	17"	2"	1 3/8"	Nickel-Plated Steel	17"	304 Stainless Steel	10-32	5/8"	No	20"	3575K17	000000




								Offset Screw Terminal

								350	18	2.9	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K593	00000


								500	24	4.2	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K413	00000
								725	35	6	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K423	00000
								750	23	6.3	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K363	00000
								900	34	7.5	12"	1,200	7 1/4"	2"	1 3/8"	Nickel-Plated Steel	7 1/4"	304 Stainless Steel	10-32	5/8"	No	11"	3575K433	00000
								1,100	33	9.2	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K443	00000
								1,250	33	10.4	15 1/4"	1,200	10 1/2"	2"	1 3/8"	Nickel-Plated Steel	10 1/2"	304 Stainless Steel	10-32	5/8"	No	14 1/4"	3575K453	00000
								1,550	33	12.9	17 7/8"	1,200	13 1/8"	2"	1 3/8"	Nickel-Plated Steel	13 1/8"	304 Stainless Steel	10-32	5/8"	No	16 7/8"	3575K463	000000
								1,700	31	14.2	19 1/2"	1,200	14 3/4"	2"	1 3/8"	Nickel-Plated Steel	14 3/4"	304 Stainless Steel	10-32	5/8"	No	18 1/2"	3575K473	000000
								1,900	33	15.8	21"	1,200	16 1/4"	2"	1 3/8"	Nickel-Plated Steel	16 1/4"	304 Stainless Steel	10-32	5/8"	No	20"	3575K483	000000


								240V AC, Single Phase







										Split Screw Terminal

		500								25	2.1	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K511	00000


		725	45							3	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K521	00000
		750	28							3.1	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K851	00000
		900	40							3.8	12"	1,200	7 1/4"	2"	1 3/8"	Nickel-Plated Steel	7 1/4"	304 Stainless Steel	10-32	5/8"	No	11"	3575K531	00000
		1,100	37							4.6	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K541	00000
		1,250	37							5.2	15 1/4"	1,200	10 1/2"	2"	1 3/8"	Nickel-Plated Steel	10 1/2"	304 Stainless Steel	10-32	5/8"	No	14 1/4"	3575K551	00000
		1,550	38							6.5	17 7/8"	1,200	13 1/8"	2"	1 3/8"	Nickel-Plated Steel	13 1/8"	304 Stainless Steel	10-32	5/8"	No	16 7/8"	3575K561	000000
		1,700	36							7.1	19 1/2"	1,200	14 3/4"	2"	1 3/8"	Nickel-Plated Steel	14 3/4"	304 Stainless Steel	10-32	5/8"	No	18 1/2"	3575K571	000000
		1,900	36							7.9	21"	1,200	16 1/4"	2"	1 3/8"	Nickel-Plated Steel	16 1/4"	304 Stainless Steel	10-32	5/8"	No	20"	3575K581	000000
		2,200	30							9.2	23 3/4"	1,200	19"	2"	1 3/8"	Nickel-Plated Steel	19"	304 Stainless Steel	10-32	5/8"	No	22 3/4"	3575K611	000000
		2,400	35							10	25 1/2"	1,200	20 3/4"	2"	1 3/8"	Nickel-Plated Steel	20 3/4"	304 Stainless Steel	10-32	5/8"	No	24 1/2"	3575K631	000000


		2,500	34							10.4	26 3/4"	1,200	22"	2"	1 3/8"	Nickel-Plated Steel	22"	304 Stainless Steel	10-32	5/8"	No	25 3/4"	3575K641	000000
		2,800	29							11.7	30 1/2"	1,200	25 3/4"	2"	1 3/8"	Nickel-Plated Steel	25 3/4"	304 Stainless Steel	10-32	5/8"	No	29 1/2"	3575K671	000000
		3,150	32							13.1	33 1/2"	1,200	28 3/4"	2"	1 3/8"	Nickel-Plated Steel	28 3/4"	304 Stainless Steel	10-32	5/8"	No	32 1/2"	3575K681	000000
		3,450	33	14.4						35 7/8"	1,200	31 1/8"	2"	1 3/8"	Nickel-Plated Steel	31 1/8"	304 Stainless Steel	10-32	5/8"	No	34 7/8"	3575K691	000000
		4,150	31	17.3	42 1/2"					1,200	37 3/4"	2"	1 3/8"	Nickel-Plated Steel	37 3/4"	304 Stainless Steel	10-32	5/8"	No	41 1/2"	3575K711	000000




				Inline Screw Terminal

				500	21					2.1	10 1/2"	1,200	6 1/2"	2"	1 3/8"	Nickel-Plated Steel	6 1/2"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K21	00000


				725	31					3	10 1/2"	1,200	6 1/2"	2"	1 3/8"	Nickel-Plated Steel	6 1/2"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K524	00000
				750	21					3.1	14"	1,200	10"	2"	1 3/8"	Nickel-Plated Steel	10"	304 Stainless Steel	10-32	5/8"	No	13"	3575K854	00000
				900	31					3.8	12"	1,200	8"	2"	1 3/8"	Nickel-Plated Steel	8"	304 Stainless Steel	10-32	5/8"	No	11"	3575K22	00000
				1,100	35					4.6	14"	1,200	10"	2"	1 3/8"	Nickel-Plated Steel	10"	304 Stainless Steel	10-32	5/8"	No	13"	3575K23	00000
				1,250	31					5.2	15 1/4"	1,200	11 1/4"	2"	1 3/8"	Nickel-Plated Steel	11 1/4"	304 Stainless Steel	10-32	5/8"	No	14 1/4"	3575K24	00000
				1,550	31					6.5	17 7/8"	1,200	13 7/8"	2"	1 3/8"	Nickel-Plated Steel	13 7/8"	304 Stainless Steel	10-32	5/8"	No	16 7/8"	3575K25	000000
				1,700	31					7.1	19 1/2"	1,200	15 1/2"	2"	1 3/8"	Nickel-Plated Steel	15 1/2"	304 Stainless Steel	10-32	5/8"	No	18 1/2"	3575K26	000000
				1,900	31					7.9	21"	1,200	17"	2"	1 3/8"	Nickel-Plated Steel	17"	304 Stainless Steel	10-32	5/8"	No	20"	3575K27	000000
				2,200	31	9.2				23 3/4"	1,200	19 3/4"	2"	1 3/8"	Nickel-Plated Steel	19 3/4"	304 Stainless Steel	10-32	5/8"	No	22 3/4"	3575K28	000000
				2,400	32	10	25 1/2"			1,200	21 1/2"	2"	1 3/8"	Nickel-Plated Steel	21 1/2"	304 Stainless Steel	10-32	5/8"	No	24 1/2"	3575K29	000000


				2,500	30	10.4	26 3/4"			1,200	22 3/4"	2"	1 3/8"	Nickel-Plated Steel	22 3/4"	304 Stainless Steel	10-32	5/8"	No	25 3/4"	3575K3	000000
				2,800	30	11.7	30 1/2"			1,200	26 1/2"	2"	1 3/8"	Nickel-Plated Steel	26 1/2"	304 Stainless Steel	10-32	5/8"	No	29 1/2"	3575K31	000000
				3,150	30	13.1	33 1/2"			1,200	29 1/2"	2"	1 3/8"	Nickel-Plated Steel	29 1/2"	304 Stainless Steel	10-32	5/8"	No	32 1/2"	3575K32	000000
				3,450	31	14.4	35 7/8"			1,200	31 7/8"	2"	1 3/8"	Nickel-Plated Steel	31 7/8"	304 Stainless Steel	10-32	5/8"	No	34 7/8"	3575K33	000000
				4,150	31	17.3	42 1/2"			1,200	38 1/2"	2"	1 3/8"	Nickel-Plated Steel	38 1/2"	304 Stainless Steel	10-32	5/8"	No	41 1/2"	3575K35	000000




						Offset Screw Terminal

						500	24			2.1	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K513	00000


						725	35			3	10 1/2"	1,200	5 3/4"	2"	1 3/8"	Nickel-Plated Steel	5 3/4"	304 Stainless Steel	10-32	5/8"	No	9 1/2"	3575K523	00000
						750	23			3.1	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K853	00000
						900	34	3.8		12"	1,200	7 1/4"	2"	1 3/8"	Nickel-Plated Steel	7 1/4"	304 Stainless Steel	10-32	5/8"	No	11"	3575K533	00000
						1,100	33	4.6	14"	1,200	9 1/4"	2"	1 3/8"	Nickel-Plated Steel	9 1/4"	304 Stainless Steel	10-32	5/8"	No	13"	3575K543	00000
						1,250	33	5.2	15 1/4"	1,200	10 1/2"	2"	1 3/8"	Nickel-Plated Steel	10 1/2"	304 Stainless Steel	10-32	5/8"	No	14 1/4"	3575K553	00000
1,550						33	6.5	17 7/8"	1,200	13 1/8"	2"	1 3/8"	Nickel-Plated Steel	13 1/8"	304 Stainless Steel	10-32	5/8"	No	16 7/8"	3575K563	000000
1,700	33					7.1	19 1/2"	1,200	14 3/4"	2"	1 3/8"	Nickel-Plated Steel	14 3/4"	304 Stainless Steel	10-32	5/8"	No	18 1/2"	3575K573	000000
1,900	30					7.9	21"	1,200	16 1/4"	2"	1 3/8"	Nickel-Plated Steel	16 1/4"	304 Stainless Steel	10-32	5/8"	No	20"	3575K583	000000
2,200	33					9.2	23 3/4"	1,200	19"	2"	1 3/8"	Nickel-Plated Steel	16"	304 Stainless Steel	10-32	5/8"	No	22 3/4"	3575K613	000000
2,400	33					10	25 1/2"	1,200	20 3/4"	2"	1 3/8"	Nickel-Plated Steel	20 3/4"	304 Stainless Steel	10-32	5/8"	No	24 1/2"	3575K633	000000


2,500	32					10.4	26 3/4"	1,200	22"	2"	1 3/8"	Nickel-Plated Steel	22"	304 Stainless Steel	10-32	5/8"	No	25 3/4"	3575K643	000000
2,800	31					11.7	30 1/2"	1,200	25 3/4"	2"	1 3/8"	Nickel-Plated Steel	25 3/4"	304 Stainless Steel	10-32	5/8"	No	29 1/2"	3575K673	000000
3,150	31					13.1	33 1/2"	1,200	28 3/4"	2"	1 3/8"	Nickel-Plated Steel	28 3/4"	304 Stainless Steel	10-32	5/8"	No	32 1/2"	3575K683	000000
3,450	31					14.4	35 7/8"	1,200	31 1/8"	2"	1 3/8"	Nickel-Plated Steel	31 1/8"	304 Stainless Steel	10-32	5/8"	No	34 7/8"	3575K693	000000
4,150	31					17.3	42 1/2"	1,200	37 3/4"	2"	1 3/8"	Nickel-Plated Steel	37 3/4"	304 Stainless Steel	10-32	5/8"	No	41 1/2"	3575K713	000000