UNF Tube Fittings | McMaster-Carr

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54 Products

How to Measure Threaded Pipe Size

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.

Tight-Seal Plastic Barbed Tube Fittings for Air and Water

Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are nylon for excellent impact and abrasion resistance.

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

Straight Adapters, Tube × Male Threaded Pipe

Temperature Range: See table
Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic

UNF Threads
For Tube ID	Thread Size	Material	Max. Pressure	Temp. Range, °F	Pkg. Qty.	Choose a Color		Pkg.
1/16"	10-32	Nylon Plastic	Not Rated	-50° to 275°	10	Black, White	000000	00000
3/32"	10-32	Nylon Plastic	Not Rated	-50° to 275°	10	Black, White	0000000	0000
1/8"	10-32	Nylon Plastic	Not Rated	-50° to 275°	10	Black, White	0000000	0000

Straight Adapters, Tube × Female Threaded Pipe

Temperature Range: See table
Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic
Clarity: See table

UNF Threads
For Tube ID	Thread Size	Material	Max. Pressure	Temp. Range, °F	Pkg. Qty.	Color	Clarity		Pkg.
1/16"	10-32	Nylon Plastic	125 psi @ 72° F	-40° to 170°	1	White	Semi-Clear	00000000	00000
3/32"	10-32	Nylon Plastic	125 psi @ 72° F	-40° to 170°	1	White	Semi-Clear	00000000	0000
1/8"	10-32	Nylon Plastic	125 psi @ 72° F	-40° to 170°	1	White	Semi-Clear	00000000	0000
5/32"	10-32	Nylon Plastic	125 psi @ 72° F	-40° to 170°	1	White	Semi-Clear	00000000	0000

90° Elbow Adapters, Tube × Male Threaded Pipe

Temperature Range: See table
Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic
Clarity: Black: Opaque; White: Semi-Clear

UNF Threads
For Tube ID	Thread Size	Material	Max. Pressure	Temp. Range, °F	Pkg. Qty.	Choose a Color		Pkg.
1/16"	10-32	Nylon Plastic	Not Rated	-50° to 275°	10	Black, White	0000000	000000
3/32"	10-32	Nylon Plastic	Not Rated	-50° to 275°	10	White	00000000	00000
1/8"	10-32	Nylon Plastic	Not Rated	-50° to 275°	10	Black, White	0000000	00000

Tight-Seal Moisture-Resistant Plastic Barbed Tube Fittings for Air and Water

Temperature Range: -20° to 280° F
Tubing: Use with firm or soft (Durometer 50A-90A) polyurethane rubber or PVC plastic
Specifications Met: FDA Compliant 21 CFR 177.2470

Fittings have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Made of acetal, they won’t absorb water and lose strength, even in high-humidity environments.

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

Straight Adapters, Tube × Male Threaded Pipe

UNF Threads
For Tube ID	Thread Size	Material	Color	Clarity	Max. Pressure		Each
1/16"	10-32	Acetal Plastic	White	Semi-Clear	Not Rated	0000000	00000
1/16"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	0000
3/32"	10-32	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	000
3/32"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	000
1/8"	10-32	Acetal Plastic	White	Semi-Clear	Not Rated	0000000	000
1/8"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	0000
5/32"	10-32	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	000
5/32"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	000
3/16"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	000

90° Elbow Adapters, Tube × Male Threaded Pipe

UNF Threads
For Tube ID	Thread Size	Material	Color	Clarity	Max. Pressure		Each
1/16"	10-32	Acetal Plastic	White	Semi-Clear	Not Rated	0000000	00000
1/8"	10-32	Acetal Plastic	White	Semi-Clear	Not Rated	0000000	0000
1/8"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	0000
3/16"	1/4"-28	Acetal Plastic	White	Semi-Clear	Not Rated	00000000	0000

Push-to-Connect Fittings for Plastic Tubing—Food and Beverage

Temperature Range: 35° to 140° F
Tubing: See table
Specifications Met:
White Polypropylene: NSF/ANSI 51, NSF/ANSI 61
Black Polypropylene: FDA Compliant 21 CFR 176.170, NSF/ANSI 58, NSF/ANSI 372
Acetal: NSF/ANSI 51, NSF/ANSI 61

Also known as instant fittings, these connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect fittings with a release ring, push on the release ring and pull the tubing out of the fitting.

Acetal fittings resist moisture, so they won’t soften and lose strength in humid environments. They meet NSF/ANSI 51 for safe use with food and NSF/ANSI 61 for safe use with drinking water.

Black fittings have excellent UV resistance and are suitable for outdoor environments.

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

Straight Adapters, Tube × Female Threaded Pipe

						Black
For Tube OD	Thread Size	Material	Max. Pressure	For Tube Hardness Rating	For Tube Hardness		Each
UNF Threads
6mm	7/16"-20	Acetal Plastic	150 psi @ 72° F	Hard	Durometer 85D-95D	0000000	00000
8mm	7/16"-20	Acetal Plastic	150 psi @ 72° F	Hard	Durometer 85D-95D	0000000	0000

International Standard ISO B Quick-Disconnect Hose Couplings for Hydraulic Fluid

A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them if you need frequent access to a hydraulic hose line. All of the International Standard ISO B quick-disconnect plugs are compatible with any of the International Standard ISO B quick-disconnect sockets of the same coupling size, regardless of the pipe size. Couplings meet ISO 7241-1 Series B dimensional and performance standards and are compatible with Parker 60 couplings. Also known as double shut-off couplings, the plugs and sockets both have a shut-off valve that stops the flow when the coupling is separated.

Push-to-connect sockets are easier to connect than sleeve-lock sockets. Connect by pushing the plug into the socket until you hear a click. To disconnect, slide the sleeve on the socket forward until the plug ejects.

Zinc-plated steel is stronger and more durable than other metals. It has fair corrosion resistance.

Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size. Pressure ratings are given for static (constant) pressure conditions.

Warning: Never attempt to connect or disconnect couplings when operating at maximum pressure. Stop the flow before you disconnect the line.

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

Push-to-Connect Sockets, UNF Female Threaded Pipe


1/4 Coupling Size
1/4 Coupling Size	3/8 Coupling Size
1/2 Coupling Size

Maximum Pressure: 3,500 psi @ 72° F
Temperature Range: -10° to 212° F
Compatible With: ISO 7241-1 Series B, Parker 60
Specifications Met: ISO 7241-1 Series B

Sockets
	For Plug Tip						Optional Dust Plugs
Coupling Size	Lg.	Dia.	Thread Size	Dash Size		Each		Each
Zinc-Plated Steel
1/4	3/8"	9/16"	1/2"-20	04	000000000	000000	00000000	00000
3/8	1/2"	3/4"	9/16"-18	06	000000000	00000	00000000	0000
1/2	1/2"	15/16"	3/4"-16	08	000000000	00000	00000000	0000

Straight-Flow Rectangular Manifolds

Unlike other manifolds, which have an inlet on either end, these have one inlet on the opposite side from the outlets. This design allows fluid or air to follow a straight path, improving flow through your system. It also frees up the ends of the manifold, so you can mount it in corners and in narrow spaces. Manifolds are also known as headers. They have mounting holes, so you can mount from the top or side.

Anodized aluminum manifolds are the industry standard for the most common types of applications. They are lighter in weight than other metal manifolds and have good corrosion resistance. These manifolds are anodized for a black finish.

Use a plug (sold separately) to close off any unused inlets and outlets.

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

Anodized Aluminum—UNF Inlets × UNF Outlets

For Use With: Air, Water, Hydraulic Fluid
Temperature Range: -10° to 200° F
Maximum Pressure:
Air: 1,000 psi @ 72° F
Water: 1,000 psi @ 72° F
Hydraulic Fluid: 3,000 psi @ 72° F

	Inlet		Outlet
No. of Outlets	Thread Size	Dash Size	Thread Size	Dash Size	Lg.	Wd.	Ht.	Outlet Ctr.-to-Ctr.	Color		Each
Standard Outlet Spacing
2	9/16"-18	6	7/16"-20	4	2 1/8"	1 1/4"	1 1/4"	7/8"	Black	00000000	000000
2	1 1/16"-12	12	3/4"-16	8	4"	2"	2"	1 1/2"	Black	00000000	00000
3	1 1/16"-12	12	3/4"-16	8	5 1/2"	2"	2"	1 1/2"	Black	00000000	00000
3	1 5/16"-12	16	1 1/16"-12	12	7"	2 1/2"	2 1/2"	2"	Black	00000000	000000
4	9/16"-18	6	7/16"-20	4	3 7/8"	1 1/4"	1 1/4"	7/8"	Black	00000000	00000
4	3/4"-16	8	9/16"-18	6	4 3/4"	1 1/2"	1 1/2"	1"	Black	00000000	00000
4	1 1/16"-12	12	3/4"-16	8	7"	2"	2"	1 1/2"	Black	00000000	00000
6	9/16"-18	6	7/16"-20	4	5 5/8"	1 1/4"	1 1/4"	7/8"	Black	00000000	00000
6	1 5/16"-12	16	1 1/16"-12	12	13"	2 1/2"	2 1/2"	2"	Black	00000000	000000
8	7/16"-20	4	5/16"-24	2	6 1/4"	1"	1"	3/4"	Black	00000000	00000
8	9/16"-18	6	7/16"-20	4	7 3/8"	1 1/4"	1 1/4"	7/8"	Black	00000000	00000

Plugs

Aluminum—UNF
Thread Size	Drive	Pressure Class	Max. Pressure		Each
7/16"-20	External Hex	150	150 psi @ 72° F	00000000	00000
9/16"-18	External Hex	150	150 psi @ 72° F	00000000	0000
3/4"-16	External Hex	150	150 psi @ 72° F	00000000	0000

Grease Fitting Adapters

When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.

Zinc-plated steel adapters have mild corrosion resistance. UNF threads are similar to threads on a machine screw or bolt. They require a sealant, such as an O-ring, to minimize leakage. SAE-LT threads are tapered but designed to be installed into a 1/4"-28 straight-thread UNF hole.

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

Straight

Adapter

Connection
Male	Female	Material		Each
Adapters
UNF 1/4"-28	NPT 1/8	Steel	0000000	00000
Metric M6 × 1 mm	UNF 1/4"-28	Zinc-Plated Steel	0000000	0000
Metric M8 × 1 mm	UNF 1/4"-28	Zinc-Plated Steel	0000000	0000
Metric M10 × 1 mm	UNF 1/4"-28	Zinc-Plated Steel	0000000	0000

65° Elbow

Connection
Male	Female	Material	Pkg. Qty.		Pkg.
Adapters
SAE-LT 1/4"-28	UNF 1/4"-28	Zinc-Plated Steel	5	0000000	00000

45° Elbow

Connection
Male	Female	Material		Each
Adapters
UNF 1/4"-28	NPT 1/8	Steel	0000000	000000

Faucet Spout Thread Adapters

Connect the female end of your garden hose to a faucet spout.

13/16"-27 thread size adapters are compatible with female threaded spouts from Chicago Faucet.

15/16"-27 thread size adapters fit most female threaded spouts.

55/64"-27 thread size adapters fit most male threaded spouts.

Straight Adapters, UNF Threaded Male Pipe × GHT Threaded Male Hose

Brass
Thread Size	Pipe Size	Garden Hose Trade Size	Max. Pressure @ Temperature	Lg.		Each
13/16"-27	1/2	3/4	80 psi @ 72° F	21/32"	0000000	000000
15/16"-27	1/2	3/4	80 psi @ 72° F	3/4"	0000000	00000

Straight Adapters, UNF Threaded Female Pipe × GHT Threaded Male Hose

Brass
Thread Size	Pipe Size	Garden Hose Trade Size	Max. Pressure @ Temperature	Lg.		Each
55/64"-27	1/2	3/4	80 psi @ 72° F	15/32"	0000000	00000