Screw Base Heaters | McMaster-Carr

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28 Products

Bulb Socket Electric Space Heaters

Screw these heaters into a light bulb socket in lockers, cabinets, and enclosures. They protect equipment from low temperatures and condensation.

					Overall		Base
	Heat Output, BTU/hr	Max. Space Heated @ Temp. Change	Wattage, W	Current, amp	Ht.	Dia.	Type	Dia.	Heating Element Material		Each
120V AC







				Enclosure Mount

				100	20 cu. ft. @ 10° F 10 cu. ft. @ 20° F 7 cu. ft. @ 30° F 5 cu. ft. @ 40° F	50	0.4	4 3/4"	1 3/8"	Medium	1 1/16"	Ceramic	1900K11	0000000


				200	30 cu. ft. @ 10° F 10 cu. ft. @ 20° F 10 cu. ft. @ 30° F 8 cu. ft. @ 40° F	70	0.6	4 3/4"	1 3/8"	Medium	1 1/16"	Ceramic	1900K12	000000
				300	40 cu. ft. @ 10° F 20 cu. ft. @ 20° F 10 cu. ft. @ 30° F 10 cu. ft. @ 40° F	100	0.8	4 3/4"	1 3/8"	Medium	1 1/16"	Ceramic	1900K14	000000
				500	60 cu. ft. @ 10° F 30 cu. ft. @ 20° F 20 cu. ft. @ 30° F 10 cu. ft. @ 40° F	150	1.3	4 3/4"	1 3/8"	Medium	1 1/16"	Ceramic	1900K15	000000
				600	90 cu. ft. @ 10° F 40 cu. ft. @ 20° F 30 cu. ft. @ 30° F 20 cu. ft. @ 40° F	200	1.7	4 3/4"	1 3/8"	Medium	1 1/16"	Ceramic	1900K16	000000

Heat Lamp Bulbs


R40 Bulb Shape	BR40 Bulb Shape	BR38 Bulb Shape	PAR38 Bulb Shape

Keep food warm, speed up drying, or make chilly workstations comfortable. These bulbs radiate infrared heat that penetrates and warms the surfaces they shine on. The higher the wattage, the more warmth they give.

Shatter-Resistant Plastic-Coated Glass Bulb—A plastic coating helps contain glass shards if the bulb breaks.

BR38 Bulb Shape, BR40 Bulb Shape, and R40 Bulb Shape—Cast a wide beam to warm large surfaces. They’re often used in hanging heat lamps and other large fixtures. These bulbs are made of blown glass.

PAR38 Bulb Shape—A narrow beam focuses heat on a small area. These bulbs are made of thick, hardened glass for added durability.

	Wattage, W	Color	For Use Outdoors	Food Industry Std.	Bulb Dia.	Overall Lg.	Voltage, V AC	Pkg. Qty.		Pkg.
Glass Bulb







				R40 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

				125	Clear	No	—	5"	6 1/2"	120	1	1547K31	00000


				250	Clear	No	—	5"	6 1/2"	120	1	1547K33	0000
				250	Clear	No	—	5"	6 1/2"	120	12	1547K331	00000
				250	Red	No	—	5"	6 1/2"	120	1	1547K34	0000
				250	Red	No	—	5"	6 1/2"	120	12	1547K341	00000
				375	Clear	No	—	5"	7 5/8"	120	1	1547K35	00000
				375	Clear	No	—	5"	7 5/8"	120	12	1547K351	000000




						BR40 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

						125	Clear	No	—	5"	6 5/8"	120	1	1547K21	0000


						250	Clear	No	—	5"	6 5/8"	120	1	1547K23	0000
						250	Red	No	—	5"	6 5/8"	120	1	1547K24	00000




								BR38 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

								175	Clear	Yes	—	4 3/4"	5 3/8"	120	1	1547K43	0000


								175	Red	Yes	—	4 3/4"	5 3/8"	120	1	1547K44	0000




										PAR38 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

										125	Clear	Yes	—	4 3/4"	5 1/4"	120	1	1547K51	00000


										175	Clear	Yes	—	4 3/4"	5 1/4"	120	1	1547K53	00000


										Shatter-Resistant Plastic-Coated Glass Bulb







														R40 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

														250	Clear	—	NSF/ANSI 2	5"	6 1/2"	120	1	2300K15	00000


250														Clear	No	NSF/ANSI 4	5"	6 1/2"	120	1	2300K21	00000
250	Clear													No	NSF/ANSI 4	5"	6 1/2"	120	12	2300K211	000000
250	Red													No	NSF/ANSI 4	5"	6 1/2"	120	1	1547K15	00000
250	Red													No	NSF/ANSI 4	5"	6 1/2"	120	12	2300K221	000000




		BR40 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

		125	Clear											No	NSF/ANSI 2	5"	6 1/2"	120	1	2300K11	00000


		250	Clear											No	NSF/ANSI 2	5"	6 1/2"	120	1	2300K13	00000
		250	Clear											No	NSF/ANSI 2	5"	6 1/2"	120	12	2300K131	000000




														PAR38 Bulb Shape—Medium-(Standard Household) Base (1 1/16" Diameter)

				175										Clear	No	NSF/ANSI 2	4 3/4"	5 3/8"	120	1	1532K691	00000