21.5mm Ferrules | McMaster-Carr

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).

Straight Adapters, Tube × Butt-Weld Tube

For Use With: Air, Beverage, Dairy, Food, Water
Tubing:
Inch Fittings: Use with welded 304/304L or 316/316L stainless steel that meets ASTM A269 or ASTM 270
Metric Fittings: 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
26mm	29mm	50.5mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	3636N22	000000	3636N34	000000
32mm	35mm	50.5mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	3636N23	00000	______	00
38mm	41mm	50.5mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	3636N24	00000	3636N36	00000
50mm	53mm	64mm	21.5mm	1.5mm	3-A Certified 63-03, DIN 32676	3636N25	00000	3636N37	00000

304 Stainless Steel Clamps with Wing Nut

For Tube OD	For Flange OD	Max. Pressure	Specifications Met		Each
26mm, 32mm, 38mm	51mm	90 psi @ 72° F	DIN 32676	3626N12	000000
50mm	64mm	50 psi @ 72° F	DIN 32676	3626N13	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
26mm	26.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	3651N46	00000
32mm	32.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	3651N47	0000
38mm	38.200mm	50.500mm	0.205"	-50° to 275°	Black	DIN 32676	3651N48	0000
50mm	50.200mm	64.000mm	0.205"	-50° to 275°	Black	DIN 32676	3651N49	0000
Silicone Rubber
26mm	26.200mm	52.580mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K104	00000
32mm	32.500mm	52.580mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K105	00000
38mm	38.200mm	52.580mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K106	00000
50mm	50.200mm	66.040mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K107	00000
PTFE Plastic
26mm	26.200mm	50.500mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K104	00000
32mm	32.200mm	50.500mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K105	00000
38mm	38.200mm	50.500mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K106	00000
50mm	50.200mm	64.000mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K107	00000