Aluminum Square-Head Plugs

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150 psi @ 72° F

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3,000 psi @ 72° F

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35 Products

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.

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	000000
1/2	Solid	150 psi @ 72° F	000000000	00000
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	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	00000
6	Solid	150 psi @ 72° F	000000000	000000

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.

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

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.

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