Metric Diffusers | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type	Show

Metric

	Thread Type Thread Type	Hide

	For Use With For Use With

Air

Inert Gas

	Body Material Body Material

	Height Height

	For Reducing For Reducing

Noise

Particles

	Gender Gender

Male

	Maximum Flow Rate Maximum Flow Rate

	Diameter Diameter

1/4"

5/16"

	Connection Type Connection Type

	Pipe

	Fitting Material Fitting Material

	Noise Reduction Rating Noise Reduction Rating

	Connection Style Connection Style

Threaded

	Removes Particle Size Down To Removes Particle Size Down To

	Maximum Temperature Maximum Temperature

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Pressure Maximum Pressure

145 psi

150 psi

175 psi

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Drive Style Drive Style

	External Hex

	Hex Size Hex Size

5/16"

3/8"

	Filter Material Filter Material

Plastic

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9 Products

About Noise, Filtration, and Flow Ratings

Use these mufflers with air-powered tools, valves, and cylinders to reduce noise and filter exhaust fumes.

Style B is knurled for easy gripping.

Brass, bronze, and copper mufflers offer good corrosion resistance.

Nylon mufflers resist corrosion and will not deteriorate when exposed to oil.

For technical drawings and 3-D models, click on a part number.

Mufflers with Pipe Connection

Metric Male Copper Fitting—Copper Body
Style	Thread Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	Dia.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating, dB		Each
B	M3	3 scfm @ 100 psi	145	300°	3/8"	1/4"	Air	100	13-21	0000000	00000
B	M5	10 scfm @ 100 psi	145	300°	5/8"	5/16"	Air	100	13-21	0000000	0000
Metric Male Brass Fitting—Brass Body
A	M5	17 scfm @ 100 psi	145	175°	11/16"	__	Air, Inert Gas	50	10-20	0000000	0000
F	M5	5 scfm @ 100 psi	175	175°	3/8"	__	Air, Inert Gas	100	10-20	0000000	0000
Metric Male Nylon Plastic Fitting—Nylon Plastic Body
G	M5	19 scfm @ 100 psi	145	212°	15/16"	1/4"	Air, Inert Gas	75	10-20	0000000	0000

Corrosion-Resistant Mufflers

Made entirely of stainless steel, these mufflers stand up to harsh, corrosive environments. Use them to reduce noise from equipment and to filter exhaust fumes.

316 stainless steel offers excellent corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Metric Male 316 Stainless Steel Fitting
	Thread Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	Dia.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating		Each
B	M3	3 scfm @ 100 psi	150	1000°	3/8"	1/4"	Air, Inert Gas	100	18-20 dB	0000000	000000
B	M5	6 scfm @ 100 psi	150	1000°	11/16"	5/16"	Air, Inert Gas	100	18-20 dB	0000000	00000

Flow-Control Mufflers

Adjust the flow by turning the screw. Use these mufflers with air-powered tools and cylinders to reduce noise and filter exhaust fumes.

For mufflers with an external hex drive, twist the screw and then tighten the hex nut with a wrench to secure. These mufflers are more secure than those with a thumb screw.

Brass, bronze, and nylon mufflers offer good corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Mufflers with External Hex Drive

Metric Nylon Plastic

Metric Male Nylon Plastic Fitting
Thread Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	For Use With	Removes Particle Size Down To, microns	Noise Reduction Rating, dB	Features		Each
M5	19 scfm @ 100 psi	145	210°	5/8"	Air, Inert Gas	75	10-20	Adjustable Airflow	0000000	000000

High-Noise-Reducing Mufflers

Install these mufflers in air-powered drills and other loud equipment. They filter exhaust fumes and reduce noise by 30 dB, a reduction that's equivalent to putting in earplugs.

Mufflers with pipe connections thread into NPT or metric threaded exhaust ports.

For technical drawings and 3-D models, click on a part number.

Mufflers with Pipe Connection

Plastic Body

Metric Male Polypropylene Plastic Fitting
Thread Size	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Ht.	Dia.	For Use With	Body Material	Noise Reduction Rating, dB		Each
M5	14 scfm @ 72 psi	145	140°	9/16"	1/4"	Air	Polypropylene Plastic	30	0000000	00000