Expansion Plugs | McMaster-Carr

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System of Measurement

Pipe Size

Expansion Plug Type

Four Arm Handle

For Pipe ID

Sealing Location

Maximum Air Back Pressure

Less than 10 psi

10 psi to 24 psi

25 psi to 49 psi

50 psi to 99 psi

100 psi or greater

Plate Material

Stainless Steel

ID

25/64" to 19/32"

33/64" to 45/64"

41/64" to 25/32"

23/32" to 15/16"

51/64" to 1 1/64"

29/32" to 1 1/16"

61/64" to 1 3/32"

1 1/32" to 1 1/4"

Material

Stainless Steel

Deflated Diameter

Plug Connection Method

Overall Height

Height

Maximum Temperature

Less than 150° F

150° F to 199° F

200° F to 249° F

250° F or greater

Handle Material

Stainless Steel

Seal Material

Maximum Water Back Pressure

Less than 50 ft. of head

50 ft. of head to 99 ft. of head

100 ft. of head to 199 ft. of head

200 ft. of head to 249 ft. of head

250 ft. of head or greater

With Bypass

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

DFARS Specialty Metals

REACH

Maximum Pressure

Less than 1,000 psi

1,000 psi to 1,999 psi

2,000 psi to 2,999 psi

3,000 psi to 3,999 psi

4,000 psi or greater

For Use With

Hydraulic Fluid

Minimum Temperature

Tapered Plug Trade Size

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531 Products

Expansion Plugs

Wing-Nut Expansion Plugs

Wing-Nut Expansion Plugs

Twist the wing nut to expand the seal without needing tools

Hex-Nut Expansion Plugs

Hex-Nut Expansion Plugs

Install with a nutdriver for a tighter seal than hand-tightened nuts

T-Handle Expansion Plugs

T-Handle Expansion Plugs

Easier to grip and twist than wing nuts, especially when wearing gloves

Expansion Plugs with Bypass

Expansion Plugs with Bypass

Use the bypass tube to add fluid to pipelines or to reduce pressure

Quick-Snap Expansion Plugs

Quick-Snap Expansion Plugs

Turn the handle to expand the seal, then snap it down for fast installation

Air-Inflatable Plugs

Air-Inflatable Plugs

Temporarily seal wide and out-of-round pipes

Long-Reach Wing-Nut Expansion Plugs

Long-Reach Wing-Nut Expansion Plugs

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

Long-Reach Hex-Nut Expansion Plugs with Bypass

Long-Reach Hex-Nut Expansion Plugs with Bypass

Use the bypass tube to add air and fluid to pipelines or to reduce pressure

Air- and Water-Inflatable Plugs

Air- and Water-Inflatable Plugs

Fit into tight pipe joints with our most flexible expansion plugs

Square-Head Expansion Plugs

Square-Head Expansion Plugs

Turn the square head into the sealing ring to close off pipelines

Air-Inflatable Plugs with Bypass

Air-Inflatable Plugs with Bypass

Temporarily seal wide and out-of-round pipes, with a bypass tube to add air and fluid

Expansion Plugs for Conduit

Expansion Plugs for Conduit

Seal conduit openings to keep water, dirt, and animals from damaging your wiring

Quick-Locking Expansion Plugs

Quick-Locking Expansion Plugs

Save time by installing with just one quarter turn

Air-Inflatable Plugs for Tee Connections

Air-Inflatable Plugs for Tee Connections

Often used for plumbing tests, thread into tees and inflate to block flow

Expansion Plugs for Cleanout Tees

Expansion Plugs for Cleanout Tees

No need to inflate with an air compressor or hand pump

Remote-Access Air-Inflatable Plugs

Remote-Access Air-Inflatable Plugs

Plug pipe that’s hard to reach, such as underground sewage lines

Air- and Water-Inflatable Plugs for Wye-Joints

Air- and Water-Inflatable Plugs for Wye-Joints

Extra long to seal off two pipes in a wye-joint at the same time

Other Products

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

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