Clamp-On Tube Fittings | McMaster-Carr

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169 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Clamp-On Fittings for Copper Tubing

For Use With: Water
Temperature Range: 32° to 180° F
Tubing: Use with copper

Use these clamp-on fittings to make leak-resistant connections on copper tubing without threading or soldering. Slide them over tubing and turn the end nuts until hand-tight, plus a quarter turn. The gasket compresses the tubing as you tighten, creating a seal while permitting moderate movement and misalignment of tube ends. Fittings are brass for good corrosion resistance.

Copper tube size is the accepted designation of the copper tubing industry, not the actual OD.

For Copper Tube Size	For Tube OD	Lg.	Material	Max. Pressure		Each
1/2	5/8"	2 9/16"	Brass	120 psi @ 72° F	4562K171	000000
1/2	5/8"	4 3/4"	Brass	120 psi @ 72° F	4562K181	00000
3/4	7/8"	2 13/16"	Brass	120 psi @ 72° F	4562K172	00000
3/4	7/8"	4 29/32"	Brass	120 psi @ 72° F	4562K182	00000
1	1 1/8"	3 1/4"	Brass	120 psi @ 72° F	4562K173	00000
1	1 1/8"	5 3/16"	Brass	120 psi @ 72° F	4562K183	00000
1 1/4	1 3/8"	2 27/32"	Brass	120 psi @ 72° F	4562K174	00000
1 1/4	1 3/8"	4 7/8"	Brass	120 psi @ 72° F	4562K184	00000
1 1/2	1 5/8"	3 3/32"	Brass	120 psi @ 72° F	4562K175	00000
1 1/2	1 5/8"	4 29/32"	Brass	120 psi @ 72° F	4562K185	00000

Vacuum Fittings for Steel Tubing

For Use With: Air, Glass, Plastic Pellets, Resins, Wood Chips
Temperature Range: -10° to 180° F
Tubing: Galvanized Steel: Use with steel, galvanized steel
Steel: Use with steel

Use these fittings to create an air vacuum system without the hassle of brazing and welding. Insert two fittings into a clamp (sold separately) and tighten to form a secure seal.

Galvanized steel fittings have fair corrosion resistance. Fittings without a finish should only be used in noncorrosive environments.

Straight Adapters, Tube × Male Threaded Pipe

				Galvanized Steel		Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each		Each
NPT Threads
2 1/8"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K136	000000	5099K61	000000
2 1/2"	2 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K137	00000	5099K62	00000
3"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K138	00000	5099K63	00000
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K139	00000	5099K64	00000
4"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K141	00000	5099K65	00000
5"	5	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K142	000000	5099K66	00000
6"	6	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K143	000000	5099K67	000000

Straight Adapters, Tube × Female Threaded Pipe

				Galvanized Steel		Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each		Each
NPT Threads
2 1/8"	2	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K144	000000	5099K71	000000
2 1/2"	2 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K145	00000	5099K72	00000
3"	3	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K146	00000	5099K73	00000
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K147	000000	5099K74	000000
4"	4	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K148	000000	5099K75	00000
5"	5	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K149	000000	5099K76	000000
6"	6	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K151	000000	5099K77	000000

Straight Adapters with Cap, Tube × Male Threaded Pipe

Adapters with cap allow you to insert tubing to create a temporary connection.

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure	Max. Vacuum		Each
1 1/2"	2	Zinc	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K152	000000
2"	2	Zinc	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K154	00000

Straight Reducers, Tube

				Galvanized Steel		Steel
For Tube OD (A)	For Tube OD (B)	Max. Pressure	Max. Vacuum		Each		Each
2 1/2"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K89	000000	5099K51	000000
3"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K98	00000	5099K52	00000
3 1/2"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K99	00000	5099K53	00000
3 1/2"	2 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K132	00000	5099K54	00000
4"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K133	00000	5099K55	00000
5"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K134	000000	5099K56	000000
6"	2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K135	000000	5099K57	000000

90° Elbow Connectors, Tube

			Galvanized Steel		Steel
For Tube OD	Max. Pressure	Max. Vacuum		Each		Each
2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K12	000000	5099K11	000000
2 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K28	00000	5099K12	00000
3"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K29	00000	5099K13	00000
3 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K34	00000	5099K14	00000
4"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K36	00000	5099K15	00000
5"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K37	000000	5099K16	00000
6"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K39	000000	5099K17	000000

45° Elbow Connectors, Tube

			Galvanized Steel		Steel
For Tube OD	Max. Pressure	Max. Vacuum		Each		Each
2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K41	000000	5099K21	000000
2 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K42	00000	5099K22	00000
3"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K44	00000	5099K23	00000
3 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K45	00000	5099K24	00000
4"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K46	00000	5099K25	00000
5"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K47	00000	5099K26	00000
6"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K49	000000	5099K27	00000

Tee Connectors, Tube

			Galvanized Steel		Steel
For Tube OD	Max. Pressure	Max. Vacuum		Each		Each
2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K58	000000	5099K31	000000
2 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K59	00000	5099K32	00000
3"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K68	00000	5099K33	00000
3 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K69	000000	5099K34	00000
4"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K71	000000	5099K39	000000
5"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K72	000000	5099K36	000000
6"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K73	000000	5099K37	000000

45° Tee Connectors, Tube

			Galvanized Steel		Steel
For Tube OD	Max. Pressure	Max. Vacuum		Each		Each
2 1/8"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K74	000000	5099K41	000000
2 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K75	00000	5099K42	00000
3"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K76	00000	5099K43	00000
3 1/2"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K77	00000	5099K44	000000
4"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K78	000000	5099K45	00000
5"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K79	000000	5099K46	000000
6"	15 psi @ 72° F	15 in. of Hg @ 72° F	4935K88	000000	5099K47	000000

Clamps for Vacuum Fittings for Steel Tubing

Use these clamps to connect vacuum tube fittings. Insert two fittings into a clamp and tighten to form a secure seal.

Bolt Clamps

For Use With: Air, Glass, Plastic Pellets, Resins, Wood Chips
Temperature Range: Neoprene Rubber Gaskets: -20° to 190° F
Silicone Rubber Gaskets: -100° to 500° F
Tubing: Use with steel

Bolt clamps have a stainless steel strip that provides an escape route for electrostatic buildup when used in a fully-grounded system. They have fair corrosion resistance.

				Neoprene Rubber Gaskets		Silicone Rubber Gaskets
For Tube OD	Material	Max. Pressure	Max. Vacuum		Each		Each
1 1/2"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K43	000000	4615K43	000000
1 3/4"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K44	00000	4615K44	00000
2"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K45	00000	4615K45	00000
2 1/8"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K54	00000	4615K54	00000
2 1/4"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K56	00000	4615K56	00000
2 1/2"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K46	00000	4615K46	00000
3"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K48	00000	4615K48	00000
5"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K32	00000	4615K32	00000
6"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K11	00000	4615K11	000000
8"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K18	00000	4615K18	000000
10"	Galvanized Steel	15 psi @ 72° F	15 in. of Hg @ 72° F	4487K64	000000	4615K64	000000

T-Handle Clamps

For Use With: Air, Plastic Pellets
Tubing: Use with galvanized steel, steel

T-handle clamps allow you to quickly disassemble and reassemble your line without tools. They offer very good corrosion resistance.

For Tube OD	Material	Gasket Material	Max. Pressure	Max. Vacuum		Each
1 1/2"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K41	000000
2"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K45	00000
2 1/4"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K47	00000
2 1/2"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K49	00000
3"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K53	00000
3 1/4"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K54	00000
5"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K65	00000
6"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K71	00000
8"	304 Stainless Steel	Gum Rubber	15 psi @ 72° F	15 in. of Hg @ 72° F	6815K77	000000

Barbed Hose Fittings for Coolant

Fittings have a barbed end that slides into rubber hose and secures with a clamp. All are nylon, which is lightweight with excellent impact and abrasion resistance. They have good corrosion resistance.

Fittings with a threaded pipe connection are also known as hose nipples. They adapt a barbed end to a threaded end.

Inline Tee Adapters, Hose × NPT Male Threaded Pipe

Maximum Pressure: 200 psi @ 72° F
Temperature Range: 0° to 230° F
Attachment Type: Use Worm-Drive Clamps or Bolt Clamps

Nylon Plastic
For Hose ID	Pipe Size	Color		Each
5/32"	1/8	Gray	5218K541	00000
3/16"	1/8	Gray	5218K543	000
3/16"	1/4	Gray	5218K544	000
1/4"	1/8	Gray	5218K546	000
1/4"	1/4	Gray	5218K547	000
1/4"	3/8	Gray	5218K548	000
1/4"	1/2	Gray	5218K549	0000
5/16"	1/8	Gray	5218K551	000
5/16"	1/4	Gray	5218K552	0000
5/16"	3/8	Gray	5218K553	0000
5/16"	1/2	Gray	5218K554	0000
3/8"	1/4	Gray	5218K555	0000
3/8"	3/8	Gray	5218K556	0000
3/8"	1/2	Gray	5218K557	0000
1/2"	1/4	Gray	5218K559	0000
1/2"	3/8	Gray	5218K561	0000
1/2"	1/2	Gray	5218K562	0000
1/2"	3/4	Gray	5218K563	0000
5/8"	1/2	Gray	5218K567	0000
5/8"	3/4	Gray	5218K568	0000
3/4"	1/2	Gray	5218K569	0000
3/4"	3/4	Gray	5218K571	0000

Inline Tee Adapters, Hose × BSPT Male Threaded Pipe

Maximum Pressure: 200 psi @ 72° F
Temperature Range: 0° to 230° F
Attachment Type: Use Worm-Drive Clamps or Bolt Clamps

Nylon Plastic
For Hose ID, mm	Pipe Size	Color		Each
4	1/4	Blue	5218K512	00000
6	1/8	Blue	5218K515	000
6	1/4	Blue	5218K516	000
10	3/8	Blue	5218K525	000
12	1/2	Blue	5218K531	0000
12	3/4	Blue	5218K532	0000