28mm 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
66mm	70mm	91mm	28mm	2mm	3-A Certified 63-03, DIN 32676	3636N26	000000	3636N38	000000
81mm	85mm	106mm	28mm	2mm	3-A Certified 63-03, DIN 32676	3636N27	00000	______	00
100mm	104mm	119mm	28mm	2mm	3-A Certified 63-03, DIN 32676	3636N28	000000	3636N4	000000

304 Stainless Steel Clamps with Wing Nut

For Tube OD	For Flange OD	Max. Pressure	Specifications Met		Each
66mm	91mm	50 psi @ 72° F	DIN 32676	3626N14	000000
81mm	106mm	30 psi @ 72° F	DIN 32676	3626N15	00000
100mm	119mm	30 psi @ 72° F	DIN 32676	3626N16	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
66mm	66.200mm	91.000mm	0.205"	-50° to 275°	Black	DIN 32676	3651N5	000000
81mm	81.200mm	106.000mm	0.205"	-50° to 275°	Black	DIN 32676	3651N51	00000
100mm	100.200mm	119.000mm	0.205"	-50° to 275°	Black	DIN 32676	3651N52	00000
Silicone Rubber
50mm	50.200mm	66.040mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K107	00000
66mm	66.200mm	93.090mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K108	00000
81mm	81.200mm	108.180mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K109	00000
100mm	100.200mm	121.110mm	5.2mm	-40° to 450°	Clear	DIN 32676, FDA Compliant 21 CFR 177.2600	4520K111	00000
PTFE Plastic
50mm	50.200mm	64.000mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K107	00000
66mm	66.200mm	91.000mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K108	00000
81mm	81.200mm	106.000mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K109	00000
100mm	100.200mm	119.000mm	5.2mm	-100° to 500°	White	DIN 32676, FDA Compliant 21 CFR 177.1550	43315K111	00000

High-Polish Gasket Fittings for Stainless Steel Tubing

For Use With: Air, Dairy, Water
Temperature Range: See Gaskets
Tubing:
Inch Butt-Weld Fittings and Quick-Clamp Fittings: Use with welded 304/304L or 316/316L stainless steel that meets ASTM 269 or ASTM 27
Metric Butt-Weld Fittings: Use with welded or seamless 316 stainless steel
Specifications Met:
304 Stainless Steel Adapters, Caps, and Nuts: 3-A Certified 63-04
Gaskets: See table

Join these fittings with a threaded nut and a gasket for a secure connection that grants you easy access to your line. Also known as bevel seat fittings, the fittings are beveled to fit snugly around the gasket, creating a vibration-resistant seal. Fittings are polished to a smooth finish on the interior to prevent product buildup and bacterial growth.

316 stainless steel fittings have excellent corrosion resistance.

Note: For a complete connection, you’ll need a threaded straight adapter, an unthreaded straight adapter, a gasket, and a nut (all sold separately unless noted).

Straight Adapters, Unthreaded Gasket × Butt Weld Tube

For Tube OD
Gasket Connection	Butt Weld Connection	Wall Thick.	Material	Max. Pressure		Each
53mm	2"	1.059"	316 Stainless Steel	360 psi @ 72° F	2132N122	000000

Nuts

For Tube OD	Nut Material	Max. Pressure		Each
53mm	304 Stainless Steel	360 psi @ 72° F	2078N112	000000

Gaskets

Buna-N Rubber
For Tube OD	ID	OD	Thick.	Temp. Range, °F	Color		Each
53mm	54.000mm	64.000mm	5mm	-30° to 200°	Blue	4524K55	000000