Boat Plugs | McMaster-Carr

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System of Measurement

Pipe Size

Expansion Plug Type

For Pipe ID

Material

Sealing Location

Maximum Air Back Pressure

Plate Material

Handle Material

Maximum Temperature

Deflated Diameter

Plug Connection Method

Height

Overall Height

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

2B999

EAR99

RoHS

Compliant

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Exempt

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

REACH

Seal Material

With Bypass

Maximum Pressure

1,000 psi to 1,999 psi

2,000 psi to 2,999 psi

3,000 psi to 3,999 psi

For Use With

Diameter

531 Products

Expansion Plugs

Wing-Nut Expansion Plugs

Twist the wing nut to expand the seal without needing tools

51 products

Quick-Snap Expansion Plugs

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

58 products

T-Handle Expansion Plugs

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

45 products

Hex-Nut Expansion Plugs

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

32 products

Expansion Plugs with Bypass

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

51 products

Air-Inflatable Plugs

Temporarily seal wide and out-of-round pipes

32 products

Square-Head Expansion Plugs

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

5 products

Air- and Water-Inflatable Plugs

Fit into tight pipe joints with our most flexible expansion plugs

6 products

Air-Inflatable Plugs with Bypass

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

10 products

Long-Reach Hex-Nut Expansion Plugs with Bypass

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

7 products

Quick-Locking Expansion Plugs

Save time by installing with just one quarter turn

6 products

Expansion Plugs for Conduit

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

11 products

Air-Inflatable Plugs for Tee Connections

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

5 products

Expansion Plugs for Cleanout Tees

No need to inflate with an air compressor or hand pump

5 products

Long-Reach Wing-Nut Expansion Plugs

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

15 products

Air- and Water-Inflatable Plugs for Wye-Joints

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

3 products

Remote-Access Air-Inflatable Plugs

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

4 products

Other Products

Protective Plugs

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

90 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

95 products