Boat Plugs | McMaster-Carr

	For Pipe Size For Pipe Size

3/16

1/4

	Expansion Plug Type Expansion Plug Type


Snap	T-Handle

Wing Nut	Hex Nut

Square Head	Inflatable

	Sealing Location Sealing Location


End of Pipe	Inside Pipe	End of Tube

	For Minimum Pipe ID For Minimum Pipe ID

	Plate Material Plate Material

Stainless Steel

Steel

Plastic

	For Maximum Pipe ID For Maximum Pipe ID

	Maximum Air Back Pressure Maximum Air Back Pressure

	Maximum Temperature Maximum Temperature

	Seal Material Seal Material

Rubber

Plastic

	With Bypass With Bypass

Yes

	For ID For ID

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Water Back Pressure Maximum Water Back Pressure

	Overall Height Overall Height

	Plug Type Plug Type


Expandable	Push In

	Minimum Temperature Minimum Temperature

	Handle Material Handle Material

Brass

Stainless Steel

	Material Material

Rubber

Stainless Steel

Steel

	Height Height

	Trade Size Trade Size

000
00
0
1
2
3
4
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
13
13 1/2
14
15
16

	Diameter Diameter

	Hardness Hardness

	Color Color

	Black
	Clear

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412 Products

Expansion Plugs

Quick-Snap Expansion Plugs

Turn the cam handle to expand the seal, then snap the handle down to hold it in place.

T-Handle Expansion Plugs

Twist the easy-grip t-handle on these plugs to expand the seal.

Hex-Nut Expansion Plugs

Tighten the nut on these plugs to expand the seal.

Wing Nut Expansion Plugs

Twist the wing nut on these plugs to expand the seal.

Square-Head Expansion Plugs

Turn the square head of the plug into the sealing ring to close off pipe openings.

Expansion Plugs with Bypass

Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing.

Expansion Plugs for Tubing

These plugs are designed for metal and rigid plastic tubing.

Deep-Reach Hex Nut Expansion Plugs with Bypass

Use the bypass tube to add air, water, and fluid or relieve back pressure.

Deep-Reach Wing Nut Expansion Plugs

Insert these plugs deep within your pipe to seal it off from the inside.

Air-Inflatable Plugs

Also known as pneumatic plugs, these plugs conform to wide and out-of-round pipes.

Air- and Water-Inflatable Plugs

Penetrate tight pipe junctures with the most flexible expansion plugs we offer.

Air- and Water-Inflatable Plugs for Y-Joints

These extra-long plugs allow you to seal off two pipes at the same time. They have two separate inflation chambers to release back pressure gradually and prevent splash back as water clears the drain line.

Air-Inflatable Plugs with Bypass

Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve back pressure while testing.

Plugs

Expandable Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters.

Expandable High-Temperature Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters. Good for paint baking and powder-coating applications, these plugs withstand temperatures up to 450° F.

Expansion Plugs for Castings

Also known as freeze plugs, these are commonly used to permanently seal the shallow holes left in a component during the casting process.