Metric Tri-Clamps | McMaster-Carr

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Metric

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Inch

Metric

	For Tube OD For Tube OD

	Type Type


Adapter	Clamp

Connector

	Connection Style Connection Style

	Material Material

	Shape Shape


Straight	90° Elbow

	For Tube Material For Tube Material

Stainless Steel

Rubber

Plastic

	Clamp Type Clamp Type

	Wing Nut

	DN Size DN Size

100

125

150

	Flange OD Flange OD

	For Flange OD For Flange OD

	Environment Environment

Sanitary

Food and Beverage

	Quick-Clamp Connection Type Quick-Clamp Connection Type

Standard

Metric

	Specifications Met Specifications Met

3-A Sanitary Certified

DIN

FDA Compliant

ASTM

	Connection Type Connection Type


Tube	Pipe

	For Tube Fabrication For Tube Fabrication

Welded

Seamless

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

RoHS Compliant

	Maximum Vacuum Maximum Vacuum

Not Rated

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Sterilize With Sterilize With

Steam (Autoclaving)

Chemicals

	Nut Material Nut Material

304 Stainless Steel

316 Stainless Steel

	For Use With For Use With

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108 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Temperature Range: See Gaskets

The smooth finish inside these fittings makes it easy to remove product residue. Also known as aseptic and tri-clamp fittings, they connect with a gasket, a clamp, and another quick-clamp fitting for a fast and easy way to access your line. The pressure rating of the fitting will vary depending on the clamp you choose, and the temperature rating will vary based on the gasket material you choose.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

Fittings that meet DIN standards adhere to international requirements for sanitary quick-clamp fittings. 3-A certified fittings comply with sanitary standards.

Note: To complete a connection, you’ll need two quick-clamp fittings, a clamp, and a gasket (all sold separately).

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

Straight Adapters, Tube × Butt-Weld Tube

For Use With: Air, Beverage, Dairy, Food, Water
Tubing:
Inch 316 Stainless Steel: Use with welded 304/304L or 316/316L stainless steel
All Other Inch: Use with welded 304/304L or 316/316L stainless steel that meets ASTM A269 or ASTM 270
Metric: Use with welded 304/304L or 316/316L stainless steel
Specifications Met: See table

Fittings with butt-weld end are also known as ferrules; they weld to tubing for a permanent, flush connection.

For Tube OD						304 Stainless Steel		316L Stainless Steel
Quick Clamp	Butt Weld	Flange OD	Lg.	Wall Thick.	Specifications Met		Each		Each
Metric
10mm	13mm	34mm	18mm	1mm	3-A Certified 63-03, DIN 32676	0000000	000000	0000000	000000
16mm	19mm	34mm	18mm	1mm	3-A Certified 63-03, DIN 32676	000000	00000	0000000	00000
20mm	23mm	34mm	18mm	1.5mm	3-A Certified 63-03, DIN 32676	0000000	00000	0000000	00000
26mm	29mm	50.5mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	0000000	00000	0000000	00000
32mm	35mm	50.5mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	0000000	00000	000000	00
38mm	41mm	50.5mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	0000000	00000	0000000	00000
50mm	53mm	64mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	0000000	00000	0000000	00000
66mm	70mm	91mm	28mm	2mm	3-A Certified 63-03, DIN 32676	0000000	00000	0000000	00000
81mm	85mm	106mm	28mm	2mm	3-A Certified 63-03, DIN 32676	0000000	00000	000000	00
100mm	104mm	119mm	28mm	2mm	3-A Certified 63-03, DIN 32676	0000000	000000	000000	000000

Straight Adapters, Tube × Metric Tube

For Use With: Air, Beverage, Dairy, Food, Water
Tubing: Use with welded 304/304L or 316/316L stainless steel
Specifications Met: DIN 32676

For Tube OD		Flange OD			316 Stainless Steel
Quick Clamp	Metric Quick Clamp, mm	Quick Clamp	Metric Quick Clamp, mm	Wall Thick.		Each
3/4"	15	0.984"	34	0.065"	0000000	0000000
1"	25	1.984"	50.5	0.136"	0000000	000000
1 1/2"	40	1.984"	52.5	0.122"	0000000	000000

Clamps

304 Stainless Steel with Wing Nut

304 Stainless Steel with Wing Nut, Spring Loaded

304 Stainless Steel with Bolt

316 Stainless Steel with Wing Nut

316 Stainless Steel with Wing Nut and 2-Pin Hinge

316 Stainless Steel with Safety Wing Nut and 2-Pin Hinge

316 Stainless Steel with Double Bolt

316 Stainless Steel with
Recessed Nut, Hole for
Lockout, and 2-Pin Hinge

White Nylon Plastic with Wing Nut

Clamps with wing nut tighten by hand. Clamps with bolt tighten with a wrench. They handle higher pressures than wing-nut clamps for a stronger, more secure hold.

304 Stainless Steel with Wing Nut
For Tube OD	For Flange OD	Bolt Material	Max. Pressure	For Tube Specifications Met	Specifications Met		Each
1/2", 3/4"	0.984"	__	1,200 psi @ 72 ° F	ASTM A269, ASTM A270	__	00000000	00000
1", 1 1/4", 1 1/2"	1.984"	__	500 psi @ 72 ° F	ASTM A269, ASTM A270	__	00000000	00000
10mm, 16mm, 20mm	34mm	__	90 psi @ 72 ° F	__	DIN 32676	0000000	00000
26mm, 32mm, 38mm	51mm	__	90 psi @ 72 ° F	__	DIN 32676	0000000	00000
50mm	64mm	__	50 psi @ 72 ° F	__	DIN 32676	0000000	00000
66mm	91mm	__	50 psi @ 72 ° F	__	DIN 32676	0000000	00000
81mm	106mm	__	30 psi @ 72 ° F	__	DIN 32676	0000000	00000
100mm	119mm	__	30 psi @ 72 ° F	__	DIN 32676	0000000	00000
304 Stainless Steel with Wing Nut, Spring Loaded
1/2", 3/4"	0.984"	__	1,200 psi @ 72 ° F	ASTM A269, ASTM A270	__	0000000	00000
1", 1 1/4", 1 1/2"	1.984"	__	500 psi @ 72 ° F	ASTM A269, ASTM A270	__	0000000	00000
304 Stainless Steel with Bolt
1/2", 3/4"	0.984"	304 Stainless Steel	1,500 psi @ 72 ° F	ASTM A269, ASTM A270	__	00000000	00000
1", 1 1/4", 1 1/2"	1.984"	304 Stainless Steel	1,500 psi @ 72 ° F	ASTM A269, ASTM A270	__	00000000	00000
316 Stainless Steel with Wing Nut
10mm, 15mm	34mm	__	725 psi @ 300 ° F	__	DIN 11864	0000000	00000
316 Stainless Steel with Wing Nut and 2-Pin Hinge
1/2", 3/4"	0.984"	__	700 psi @ 72 ° F	__	__	0000000	00000
1", 1 1/4", 1 1/2"	1.984"	__	700 psi @ 72 ° F	__	__	0000000	00000
316 Stainless Steel with Safety Wing Nut and 2-Pin Hinge
1/2", 3/4"	0.984"	__	720 psi @ 72 ° F	__	__	0000000	00000
1", 1 1/4", 1 1/2"	1.984"	__	720 psi @ 72 ° F	__	__	0000000	00000
316 Stainless Steel with Double Bolt
1", 1 1/4", 1 1/2"	1.984"	316 Stainless Steel	2,400 psi @ 72 ° F	__	ASME BPVC.VIII	0000000	000000
316 Stainless Steel with Recessed Nut, Hole for Lockout, and 2-Pin Hinge
1/2", 3/4"	0.984"	__	720 psi @ 72 ° F	__	__	0000000	00000
1", 1 1/4", 1 1/2"	1.984"	__	720 psi @ 72 ° F	__	__	0000000	00000
White Nylon Plastic with Wing Nut
1/2", 3/4"	0.984"	__	150 psi @ 72 ° F	ASTM A269, ASTM A270	__	00000000	00000
1", 1 1/4", 1 1/2"	1.984"	__	150 psi @ 72 ° F	ASTM A269, ASTM A270	__	00000000	00000

Gaskets

EPDM gaskets resist water and steam and work well in humid environments.

EPDM Rubber
For Tube OD	ID	OD	Thick.	Temp. Range, °F	Color	Specifications Met		Each
10mm	10.200mm	34.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
16mm	16.200mm	34.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
20mm	20.200mm	34.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
26mm	26.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
32mm	32.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
38mm	38.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
50mm	50.200mm	64.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
66mm	66.200mm	91.000mm	0.205"	-50° to 275°	Black	DIN 32676	000000	00000
81mm	81.200mm	106.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
100mm	100.200mm	119.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000

Gasket Fittings—Male Straight Adapters, Gasket × Standard Tube

For Tube OD
Gasket Connection	Standard Connection	Wall Thick.	Material	For Tube Specifications Met	Includes		Each
1"	1"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	304 Stainless Steel Nut	0000000	0000000
1 1/2"	1 1/2"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	304 Stainless Steel Nut	0000000	000000

Gasket Fittings—Female Straight Adapters, Gasket × Standard Tube

For Tube OD
Gasket Connection	Standard Connection	Wall Thick.	Material	For Tube Specifications Met		Each
1"	1"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	0000000	000000
1 1/2"	1 1/2"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	0000000	000000

Extra-Support Fittings—Male Straight Adapters, Extra-Support Tube × Standard Tube

	Flange OD
For Tube OD	Extra-Support Connection	Standard Connection	Wall Thick.	Material	For Tube Specifications Met		Each
1"	1.995"	1.984"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	0000000	000000
1 1/2"	1.995"	1.984"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	0000000	00000

Extra-Support Fittings—Female Straight Adapters, Extra-Support Tube × Standard Tube

	Flange OD
For Tube OD	Extra-Support Connection	Standard Connection	Wall Thick.	Material	For Tube Specifications Met		Each
1"	1.995"	1.984"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	0000000	000000
1 1/2"	1.995"	1.984"	0.065"	316 Stainless Steel	ASTM A269, ASTM A270	0000000	00000

Clamps for High-Polish Metal Quick-Clamp Sanitary Tube Fittings

Temperature Range: See Gaskets or O-Rings
Tubing:
Inch 304 Stainless Steel and Nylon Plastic: Use with welded 304/304L and 316/316L stainless steel that meets ASTM A269 or ASTM A270
Metric 304 Stainless Steel: Use with welded 304/304L and 316/316L stainless steel
Inch 316 Stainless Steel: Use with welded 304/304 L and 316/316L stainless steel
Metric 316 Stainless Steel: Use with welded 316/316L Stainless Steel

Connect quick-clamp sanitary tube fittings—also known as aseptic fittings—for a fast and easy way to access your line. Clamps with wing nut tighten by hand.

304 stainless steel clamps have very good corrosion resistance.

316 stainless steel clamps are more corrosion resistant than 304 stainless steel clamps.

Clamps that meet DIN 11864 or DIN 32676 adhere to international standards for sanitary quick-clamp fittings.

Clamps

304 Stainless Steel with Wing Nut

316 Stainless Steel with Wing Nut

304 Stainless Steel with Wing Nut
For Tube OD	For Flange OD	Max. Pressure	Specifications Met		Each
10mm, 16mm, 20mm	34mm	90 psi @ 72° F	DIN 32676	0000000	000000
26mm, 32mm, 38mm	51mm	90 psi @ 72° F	DIN 32676	0000000	00000
50mm	64mm	50 psi @ 72° F	DIN 32676	0000000	00000
66mm	91mm	50 psi @ 72° F	DIN 32676	0000000	00000
81mm	106mm	30 psi @ 72° F	DIN 32676	0000000	00000
100mm	119mm	30 psi @ 72° F	DIN 32676	0000000	00000
125mm	155mm	30 psi @ 72° F	DIN 32676	0000000	000000
150mm	183mm	30 psi @ 72° F	DIN 32676	0000000	000000
316 Stainless Steel with Wing Nut
10mm, 15mm	34mm	725 psi @ 300° F	DIN 11864	0000000	00000
20mm, 25mm	50.5mm	725 psi @ 300° F	DIN 11864	0000000	00000
32mm, 40mm	64mm	725 psi @ 300° F	DIN 11864	0000000	00000
50mm	91mm	580 psi @ 300° F	DIN 11864	0000000	00000
65mm	106mm	580 psi @ 300° F	DIN 11864	0000000	00000
80mm	119mm	500 psi @ 300° F	DIN 11864	0000000	000000

Gaskets and O-Rings

The temperature rating of the fitting will vary depending on the gasket or O-ring material you choose. EPDM resists water and steam and works well in humid environments. Fluoroelastomer stands up to fuel, oil, and acid condensates. PTFE withstands harsh chemicals, with the exception of molten alkali metal and elemental fluorine.

Gaskets
For Tube OD	ID	OD	Thick.	Temp. Range, °F	Color	Specifications Met		Each
EPDM Rubber
10mm	10.200mm	34.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
16mm	16.200mm	34.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
20mm	20.200mm	34.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
26mm	26.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
32mm	32.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
38mm	38.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
50mm	50.200mm	64.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	0000
66mm	66.200mm	91.000mm	0.205"	-50° to 275°	Black	DIN 32676	000000	00000
81mm	81.200mm	106.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
100mm	100.200mm	119.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
125mm	125.200mm	155.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
150mm	150.200mm	183.000mm	0.205"	-50° to 275°	Black	DIN 32676	0000000	00000
O-Rings
EPDM Rubber
10mm	12.000mm	19.000mm	__	32° to 280°	Black	3-A Certified 18-00	0000000	00000
20mm	22.000mm	29.000mm	__	32° to 280°	Black	3-A Certified 18-00	0000000	00000
32mm	34.000mm	44.000mm	__	32° to 280°	Black	3-A Certified 18-00	0000000	00000
65mm	68.000mm	78.000mm	__	32° to 280°	Black	3-A Certified 18-00	0000000	00000
80mm	83.000mm	93.000mm	__	32° to 280°	Black	3-A Certified 18-00	0000000	00000
Viton® Fluoroelastomer Rubber
10mm	12.000mm	19.000mm	__	32° to 300°	Black	3-A Certified 18-00	0000000	00000
20mm	22.000mm	29.000mm	__	32° to 300°	Black	3-A Certified 18-00	0000000	00000
32mm	34.000mm	44.000mm	__	32° to 300°	Black	3-A Certified 18-00	0000000	00000
65mm	68.000mm	78.000mm	__	32° to 300°	Black	3-A Certified 18-00	0000000	00000
80mm	83.000mm	93.000mm	__	32° to 300°	Black	3-A Certified 18-00	0000000	00000
PTFE Plastic
10mm	12.000mm	19.000mm	__	32° to 280°	White	3-A Certified 18-00	0000000	00000
20mm	22.000mm	29.000mm	__	32° to 280°	White	3-A Certified 18-00	0000000	00000
32mm	34.000mm	44.000mm	__	32° to 280°	White	3-A Certified 18-00	0000000	00000
65mm	68.000mm	78.000mm	__	32° to 280°	White	3-A Certified 18-00	0000000	00000

Butt-Weld Fittings for Stainless Steel Tubing

For Use With: See table
Max. Temperature: 250° F, except hose fittings are unrated.
Tubing:
304 Stainless Steel: Use with 304/304L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except DIN EN 10357 fittings with only ASTM A269 or ASTM A270
316 Stainless Steel: Use with 316/316L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except ASME BPE and DIN EN 10357 fittings with only ASTM A269 or ASTM A270
Specifications Met: See table

Weld these fittings to tubing for a permanent, flush connection that permits smooth flow through a line.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

DIN EN 10357 fittings meet an international standard for butt-weld fitting specifications. This standard is common in the food and chemical industries.

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

Short 90° Elbow Connectors, Tube

							304/304L Stainless Steel		316/316L Stainless Steel
For Tube OD	Max. Pressure	Max. Vacuum	Lg.	Wall Thick.	For Use With	Specifications Met		Each		Each
Polished
13mm	Not Rated	Not Rated	26mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	000000	0000000	000000
19mm	Not Rated	Not Rated	35mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	00000	0000000	00000
23mm	Not Rated	Not Rated	40mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	00000	000000	00
29mm	Not Rated	Not Rated	50mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	00000	0000000	00000
35mm	Not Rated	Not Rated	55mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	00000	000000	00
41mm	Not Rated	Not Rated	60mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	00000	0000000	00000
53mm	Not Rated	Not Rated	70mm	1.5mm	Dairy, Food	DIN EN 10357	0000000	00000	0000000	00000
70mm	Not Rated	Not Rated	80mm	2mm	Dairy, Food	DIN EN 10357	0000000	00000	000000	00
104mm	Not Rated	Not Rated	100mm	2mm	Dairy, Food	DIN EN 10357	0000000	00000	000000	00

Stainless Steel Barbed Tube Fittings for Food and Beverage

Temperature Range: -20° to 750° F
Tubing: Use with soft or firm (Durometer 65A-90A) polyurethane rubber or PVC plastic
Specifications Met: See table

Made of stainless steel, these fittings are more durable than plastic barbed tube fittings for food and beverage. They have single or multiple barbs that grip onto tubing.

Metric and BSPP fittings have a Buna-N O-ring to ensure a strong seal. Buna-N is made of FDA listed material for use with food and beverages. These O-rings are resilient and resist tearing, animal and vegetable oil, citric acid, sodium bicarbonate, grease, and motor oil.

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

Straight Adapters, Tube × Male Threaded Pipe

BSPP and Metric Male Threads with O-Ring

Metric Threads
For Tube ID	O-Ring Material	Pipe Size	Thread Size	Material	Max. Pressure	Specifications Met		Each
4mm	Buna-N Rubber	__	M6	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	00000
6mm	Buna-N Rubber	__	M5	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
6mm	Buna-N Rubber	__	M6	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
BSPP Threads
4mm	Buna-N Rubber	1/8	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
4mm	Buna-N Rubber	1/4	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
6mm	Buna-N Rubber	1/8	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
6mm	Buna-N Rubber	1/4	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
8mm	Buna-N Rubber	1/8	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
8mm	Buna-N Rubber	1/4	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	0000
8mm	Buna-N Rubber	1/2	__	303 Stainless Steel	270 psi @ 72° F	ASTM A581, ASTM A582, FDA Compliant 21 CFR 177.2600	00000000	00000