3 5/8" Tube Fittings | McMaster-Carr

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Copper Tube Size

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8 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.

Solder-Connect Fittings for Copper Tubing

Temperature Range: 32° to 200° F

Solder these fittings to copper tubing or the tube end of another fitting for a permanent, leak-tight connection. They are also known as sweat fittings. Fittings have good corrosion resistance. To adhere to safety standards for drinking water systems, use fittings that meet NSF/ANSI 61 or EN 1057.

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

Straight Adapters, Male Socket-Connect Tube × Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61

Tube Connection (A)		Tube Connection (B)
Copper Tube Size	Tube OD	Copper Tube Size	For Tube OD	Material	Max. Pressure	Lg.		Each
3 1/2	3 5/8"	2	2 1/8"	Copper	300 psi @ 72° F	4 9/64"	5520K612	000000
3 1/2	3 5/8"	2 1/2	2 5/8"	Copper	300 psi @ 72° F	3 29/32"	5520K613	00000
3 1/2	3 5/8"	3	3 1/8"	Copper	300 psi @ 72° F	3 29/32"	5520K614	00000
4	4 1/8"	3 1/2	3 5/8"	Copper	200 psi @ 72° F	4 5/8"	5520K618	00000

Straight Connectors, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61

Copper Tube Size	For Tube OD	Material	Max. Pressure		Each
3 1/2	3 5/8"	Copper	300 psi @ 72° F	5520K631	000000

Straight Reducers with Center Stop, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61

Fittings with center stop have a small internal ridge that prevents the tubing from sliding all the way through the fitting.

Tube Connection (A)		Tube Connection (B)
Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Material	Max. Pressure		Each
4	4 1/8"	3 1/2	3 5/8"	Copper	200 psi @ 72° F	5520K637	0000000

Short 90° Elbow Connectors, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: See table
Specifications Met: See table

Copper Tube Size	For Tube OD	Material	Max. Pressure	For Copper Tube Type	Specifications Met		Each
3 1/2	3 5/8"	Copper	300 psi @ 72° F	K, M, L	ASME B16.22, MSS-SP104, NSF/ANSI 61	5520K648	0000000

Caps

For Use With: Drinking Water
Tubing: See table
Specifications Met: See table

Copper Tube Size	For Tube OD	Material	Max. Pressure	For Copper Tube Type	Specifications Met		Each
3 1/2	3 5/8"	Copper	300 psi @ 72° F	K, M, L	ASME B16.22, MSS-SP104, NSF/ANSI 61	5520K363	0000000