Mechanical Expansion Test Plugs | McMaster-Carr

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271 Products

Expansion Plugs

Wing Nut Expansion Plugs

Wing Nut Expansion Plugs

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

T-Handle Expansion Plugs

T-Handle Expansion Plugs

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

Hex-Nut Expansion Plugs

Hex-Nut Expansion Plugs

Tighten the nut on these plugs to expand the seal.

Quick-Snap Expansion Plugs

Quick-Snap Expansion Plugs

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

Square-Head Expansion Plugs

Square-Head Expansion Plugs

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

Quick-Lock Expansion Plugs

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Save time sealing off pipe or valve box openings. These plugs install with one quarter turn of the handle, unlike wing nut expansion plugs that require multiple turns.

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.

Deep-Reach Wing Nut Expansion Plugs

Insert these plugs deep within your pipe to temporarily block off a line. Twist their wing nut to expand the seal.

Deep-Reach Hex Nut Expansion Plugs with Bypass

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

Expansion Plugs for Cleanout Tees

Seal cleanout tees when testing your drain, waste, and vent systems for pressure and leaks—no need to inflate these plugs with an air compressor or hand pump.

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)