Aluminum Socket Pipe Fitting Plugs

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104 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.

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.

DIN 3852 fittings meet DIN standards for mating surface outer diameter. They have a Buna-N rubber gasket that resists grease, hydraulic oil, and motor oil—plus mild chemicals and water. The gasket stays in a groove undercut in the mating face, which prevents it from dropping out and from extruding when fittings are tightened. Black anodized and powder-coated fittings have a decorative matte black finish.

The contact surface on fittings with a flange extends beyond the external hex drive.

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

Plugs with Square Drive

For Use With: Air, Oil, Water
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
3/8	Solid	150 psi @ 72° F	000000000	00000
1/2	Solid	150 psi @ 72° F	000000000	0000
3/4	Solid	150 psi @ 72° F	000000000	00000
1	Solid	150 psi @ 72° F	000000000	00000
1 1/4	Solid	150 psi @ 72° F	000000000	00000
1 1/2	Solid	150 psi @ 72° F	000000000	00000
2	Solid	150 psi @ 72° F	000000000	00000
2 1/2	Solid	150 psi @ 72° F	000000000	00000
3	Solid	150 psi @ 72° F	000000000	00000
4	Solid	150 psi @ 72° F	000000000	000000

Plugs with External Square Drive

For Use With: Air, Oil, Water
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
1/8	Solid	150 psi @ 72° F	000000000	00000
1/4	Solid	150 psi @ 72° F	000000000	0000
3/8	Solid	150 psi @ 72° F	000000000	0000
1/2	Solid	150 psi @ 72° F	000000000	0000
3/4	Solid	150 psi @ 72° F	000000000	0000
1	Solid	150 psi @ 72° F	000000000	0000
1 1/4	Solid	150 psi @ 72° F	000000000	00000
1 1/2	Solid	150 psi @ 72° F	000000000	00000
2	Solid	150 psi @ 72° F	000000000	00000
2 1/2	Solid	150 psi @ 72° F	000000000	00000
3	Solid	150 psi @ 72° F	000000000	00000
4	Solid	150 psi @ 72° F	000000000	00000
6	Solid	150 psi @ 72° F	000000000	000000

Plugs with Hex Drive

For Use With: Air, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM B221, Fed. Spec. QQ-A-200/8
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 80 aluminum

				Black Anodized 2011 Aluminum
Pipe Size	Drive Size	Plug Construction	Max. Pressure		Each
NPT Male
1/16	5/32"	Solid	150 psi @ 72° F	00000000	00000
1/8	3/16"	Solid	150 psi @ 72° F	00000000	0000
1/4	1/4"	Solid	150 psi @ 72° F	00000000	0000
3/8	5/16"	Solid	150 psi @ 72° F	00000000	0000
1/2	3/8"	Solid	150 psi @ 72° F	00000000	00000
3/4	9/16"	Solid	150 psi @ 72° F	00000000	00000
1	5/8"	Solid	150 psi @ 72° F	00000000	00000
1 1/4	3/4"	Solid	150 psi @ 72° F	00000000	00000
BSPT Male
1/8	3/16"	Solid	150 psi @ 72° F	00000000	0000
1/4	1/4"	Solid	150 psi @ 72° F	00000000	0000
3/8	5/16"	Solid	150 psi @ 72° F	00000000	0000
1/2	3/8"	Solid	150 psi @ 72° F	00000000	00000

Plugs with External Hex Drive

Metric and UNF Male Threads with Gasket

For Use With: Air, Water, Hydraulic Fluid
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM B221, Fed. Spec. QQ-A-200/8
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 80 aluminum

NPT Male
Pressure Class	Pipe Size	Thread Size	Thread Pitch, mm	Drive Size	Plug Construction	Max. Pressure		Each
150	1/16	__	__	5/16"	Solid	150 psi @ 72° F	00000000	00000
Metric Male
150	__	M3	0.5	1/4"	Solid	150 psi @ 72° F	00000000	0000
150	__	M6	1	7/16"	Solid	150 psi @ 72° F	00000000	0000
150	__	M10	1.25	5/8"	Solid	150 psi @ 72° F	00000000	0000
150	__	M12	1.25	11/16"	Solid	150 psi @ 72° F	00000000	0000
UNF Male
150	__	10-32	__	5/16"	Solid	150 psi @ 72° F	00000000	0000
150	__	7/16"-20	__	5/8"	Solid	150 psi @ 72° F	00000000	0000
150	__	9/16"-18	__	3/4"	Solid	150 psi @ 72° F	00000000	0000
150	__	3/4"-16	__	1 1/4"	Solid	150 psi @ 72° F	00000000	0000

Plugs with External Hex Drive and Flange

BSPP and Metric
Male Threads
with Gasket

For Use With: Air, Oil, Water
Specifications Met: DIN 3852
Pipe Nipples and Pipe: Use aluminum

						Black Anodized Aluminum Alloy		Aluminum Alloy
Pipe Size	Thread Size	Thread Pitch, mm	Drive Size	Plug Construction	Max. Pressure		Each		Each
BSPP Male
1/4	__	__	15 mm	Solid	Not Rated	00000000	000000	00000000	00000
3/8	__	__	18 mm	Solid	Not Rated	000000	00	00000000	0000
1/2	__	__	21 mm	Solid	Not Rated	000000	00	00000000	0000
3/4	__	__	27 mm	Solid	Not Rated	000000	00	00000000	00000
1	__	__	32 mm	Solid	Not Rated	000000	00	00000000	00000
1 1/2	__	__	50 mm	Solid	Not Rated	00000000	00000	00000000	00000
Metric Male
1/4	M14	1.5	15 mm	Solid	Not Rated	00000000	00000	00000000	0000
3/8	M16	1.5	18 mm	Solid	Not Rated	00000000	00000	00000000	0000
1/2	M20	1.5	21 mm	Solid	Not Rated	00000000	00000	00000000	0000
3/4	M26	1.5	27 mm	Solid	Not Rated	00000000	00000	000000	00
1	M33	1.5	32 mm	Solid	Not Rated	00000000	00000	00000000	00000
1 1/4	M42	1.5	41 mm	Solid	Not Rated	000000	00	00000000	00000
1 1/4	M42	2	41 mm	Solid	Not Rated	00000000	00000	000000	00

High-Pressure Aluminum Threaded Pipe Fittings

Also known as Pressure Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer. They are lightweight with good corrosion resistance.

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

Plugs with External Hex Drive

For Use With: Air, Water
Pressure Class : 3000
Specifications Met: Fed. Spec. QQ-A-200/8, ASTM B221, ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 aluminum

NPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
1/4	Solid	3,000 psi @ 72° F	0000000	000000
1/2	Solid	3,000 psi @ 72° F	0000000	00000
3/4	Solid	3,000 psi @ 72° F	0000000	00000
1	Solid	3,000 psi @ 72° F	0000000	00000

Plugs with External Square Drive

For Use With: Air, Water
Pressure Class : 3000
Specifications Met: Fed. Spec. QQ-A-200/8, ASTM B221, ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 aluminum

NPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
1/4	Solid	3,000 psi @ 72° F	0000000	000000
1/2	Solid	3,000 psi @ 72° F	0000000	00000
3/4	Solid	3,000 psi @ 72° F	0000000	00000
1	Solid	3,000 psi @ 72° F	0000000	00000

Medium-Pressure Aluminum Threaded Pipe Fittings

Designed for medium-pressure applications, these fittings have better strength than our low-pressure aluminum pipe fittings. They are lightweight with good corrosion resistance.

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

Plugs with External Square Drive

For Use With: Air, Oil, Water
Pipe Nipples and Pipe: Use Schedule 40 Aluminum

BSPT Male
Pipe Size	Plug Construction	Max. Pressure		Each
1/8	Solid	250 psi @ 72° F	0000000	00000
1/4	Solid	250 psi @ 72° F	0000000	0000
3/8	Solid	250 psi @ 72° F	0000000	00000
1/2	Solid	250 psi @ 72° F	0000000	00000
3/4	Solid	250 psi @ 72° F	0000000	00000
1	Solid	250 psi @ 72° F	0000000	00000
1 1/2	Solid	250 psi @ 72° F	0000000	00000
2	Solid	250 psi @ 72° F	0000000	00000

Plugs with External Hex Drive

Metric Male Threads with Gasket

For Use With: Air, Water, Hydraulic Fluid
Temperature Range: -10° to 200° F
Maximum Vacuum: 27 in. of Hg @ 72 ° F

Metric Male
Thread Size	Thread Pitch, mm	Drive Size	Plug Construction	Max. Pressure		Each
M5	0.8	8 mm	Solid	1,000 psi @ 72° F	00000000	00000
M8	1.25	14 mm	Solid	1,000 psi @ 72° F	00000000	0000
M14	1.5	19 mm	Solid	1,000 psi @ 72° F	00000000	0000
M16	1.5	22 mm	Solid	1,000 psi @ 72° F	00000000	00000
M18	1.5	25 mm	Solid	1,000 psi @ 72° F	00000000	00000
M20	1.5	25 mm	Solid	1,000 psi @ 72° F	00000000	00000
M22	1.5	29 mm	Solid	1,000 psi @ 72° F	00000000	00000

37° Flared Fittings for Aluminum Tubing

For Use With: Air, Coolant, Gasoline, Hydraulic Fluid, Water
Temperature Range: -60° to 400° F
Tubing: Use with seamless aluminum

Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are aluminum, which is lightweight with good corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.

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

Plugs

For Tube OD	Material	Max. Pressure		Each
1/4"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	00000
3/8"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
1/2"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
5/8"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
3/4"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
1"	Anodized 2024 Aluminum	1,500 psi @ 72° F	0000000	00000

Nuts

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	00000
3/8"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
1/2"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
5/8"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
3/4"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
1"	Anodized 2024 Aluminum	1,500 psi @ 72° F	0000000	0000

Sleeves

For Tube OD	Sleeve Material	Max. Pressure		Each
1/4"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	00000
3/8"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
1/2"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
5/8"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
3/4"	Anodized 2024 Aluminum	3,000 psi @ 72° F	0000000	0000
1"	Anodized 2024 Aluminum	1,500 psi @ 72° F	0000000	0000