Brass Vent Caps | McMaster-Carr

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28 Products

Breather Vents


Style A	Style H

Protect against excess vacuum and pressure in cylinders, gear boxes, enclosures, manifolds, and tanks. You can also use these breather vents to block debris from entering equipment.

Style H—Style H has a Buna-N O-ring for extra protection against leaks.

	Style	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	For Use With	Removes Particle Size Down To, μm		Each
NPT Male







		Zinc-Plated Steel Body and Fitting

		A	2	—	1,095 scfm @ 100 psi	150	300	1 5/8"	Air, Inert Gas	90	9833K16	000000




				Nickel-Plated Steel Body and Fitting

				A	1/8	—	2 scfm @ 100 psi	150	300	7/16"	Air, Inert Gas	40	9833K21	0000


				A	1/4	—	3 scfm @ 100 psi	150	300	5/8"	Air, Inert Gas	40	9833K22	0000
				A	3/8	—	7 scfm @ 100 psi	150	300	3/4"	Air, Inert Gas	40	9833K23	0000
				A	1/2	—	17 scfm @ 100 psi	150	300	7/8"	Air, Inert Gas	40	9833K11	0000
				A	3/4	—	20 scfm @ 100 psi	150	300	1"	Air, Inert Gas	40	9833K12	0000
				A	1	—	28 scfm @ 100 psi	150	300	1 5/16"	Air, Inert Gas	40	9833K13	0000
				A	1 1/4	—	50 scfm @ 100 psi	150	300	1 7/16"	Air, Inert Gas	40	9833K14	00000
				A	1 1/2	—	73 scfm @ 100 psi	150	300	1 1/2"	Air, Inert Gas	40	9833K15	00000




						Brass Body and Fitting

						A	1/16	—	13 scfm @ 100 psi	150	300	1/2"	Air, Inert Gas	90	9833K19	0000


						UNF Male







										Brass Body and Fitting

										A	—	10-32	6 scfm @ 100 psi	150	300	3/8"	Air, Inert Gas	90	9833K18	0000


										H	—	10-32	1 scfm @ 100 psi	125	200	7/16"	Air, Inert Gas	40	8556T24	0000


										BSPT Male







														Zinc-Plated Steel Body and Fitting

														A	1/8	—	26 scfm @ 100 psi	150	300	7/16"	Air, Inert Gas	90	9847K11	0000


A														1/4	—	35 scfm @ 100 psi	150	300	11/16"	Air, Inert Gas	90	9847K12	0000
A	3/8													—	87 scfm @ 100 psi	150	300	13/16"	Air, Inert Gas	90	9847K13	0000
A	1/2													—	131 scfm @ 100 psi	150	300	1"	Air, Inert Gas	90	9847K14	0000
A	3/4													—	219 scfm @ 100 psi	150	300	1 1/16"	Air, Inert Gas	90	9847K15	0000


NPSM Female







		Zinc-Plated Steel Body and Fitting

		F	1/8											—	26 scfm @ 100 psi	150	300	5/8"	Air, Inert Gas	90	9833K24	0000


		F	1/4											—	35 scfm @ 100 psi	150	300	3/4"	Air, Inert Gas	90	9833K25	0000
		F	3/8											—	87 scfm @ 100 psi	150	300	15/16"	Air, Inert Gas	90	9833K26	0000
		F	1/2											—	131 scfm @ 100 psi	150	300	1"	Air, Inert Gas	90	9833K27	0000

Self-Draining Breather Vents

Minimize moisture buildup in enclosures. Also known as drain plugs, these breather vents have a small outlet that allows condensation to drain. They have a silicone O-ring above the threads for a tight seal. Install them at the lowest point of the enclosure. Breather vents meet IP66 for protection in washdown environments. Use them to prevent excess vacuum and pressure in cylinders, gear boxes, and tanks and to block debris from entering equipment.

Threaded NPT Male

Image of Product. Bottom orientation. Breather Vents. Self-Draining Breather Vents.

316 Stainless Steel Body and Fitting—316 stainless steel breather vents have excellent corrosion resistance.

Brass Body and Fitting—Brass breather vents have good corrosion resistance.

	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Hazardous Location Protection Type	Enclosure Rating	Hazardous Location Rating	O-Ring Material	Certification	Features		Each
316 Stainless Steel Body and Fitting



	1/4	Not Rated	Not Rated	320	1 1/16"	11/16"	Air	Corrosive, Dusty, Outdoor, Washdown, Wet	—	IP66, NEMA 4X	—	Silicone Rubber	—	Drain	8602T31	000000


	1/2	Not Rated	Not Rated	320	1 1/8"	1"	Air	Corrosive, Dusty, Hazardous, Outdoor, Washdown, Wet	Increased Safety, Protection by Enclosure	IP66, NEMA 4X	ATEX I M2 Ex E I Mb; ATEX II 2 GD Ex E IIC Gb Ex Tb IIIC Db; IEC Zone 1 Groups IIC, IIB, IIA; IEC Zone 21 Groups IIIC, IIIB, IIIA; IECEx Ex E I/IIC Mb/Gb; IECEx Ex IIIC Tb Db	Silicone Rubber	CE Marked	Drain	8602T32	00000


	Brass Body and Fitting



			1/4	Not Rated	Not Rated	320	1 1/16"	11/16"	Air	Corrosive, Dusty, Outdoor, Washdown, Wet	—	IP66, NEMA 4X	—	Silicone Rubber	—	Drain	8602T11	00000


			1/2	Not Rated	Not Rated	320	1 1/8"	1"	Air	Corrosive, Dusty, Hazardous, Outdoor, Washdown, Wet	Increased Safety, Protection by Enclosure	IP66, NEMA 4X	ATEX I M2 Ex E I Mb; ATEX II 2 GD Ex E IIC Gb Ex Tb IIIC Db; IEC Zone 1 Groups IIC, IIB, IIA; IEC Zone 21 Groups IIIC, IIIB, IIIA; IECEx Ex E I/IIC Mb/Gb; IECEx Ex IIIC Tb Db	Silicone Rubber	CE Marked	Drain	8602T12	00000

Submersible Threaded Breather Vents

Use these vents to maintain consistent pressure as temperatures fluctuate by allowing air to flow through sealed enclosures. All have a hydrophobic and oleophobic filter membrane that blocks moisture and contamination from particle buildup.

Metric

Nickel-Plated

Brass

Nickel-Plated Brass—Nickel-plated brass vents stand up to corrosive environments better than nylon and polycarbonate vents. They’re also durable, which means you won’t have to replace them as often.

Head Dia.	Environment	Enclosure Rating	Features		Each







Nickel-Plated Brass

M12	1.5	1/2"	3/4"	Dusty, Submersible, Washdown, Wet	IP66, IP68	Gasket	4375N11	000000


M16	1.5	5/8"	3/4"	Dusty, Submersible, Washdown, Wet	IP66, IP68	Gasket	4375N12	00000
M20	1.5	13/16"	15/16"	Dusty, Submersible, Washdown, Wet	IP66, IP68	Gasket	4375N13	00000