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Expansion Plugs

Stop coolant or oil leaks fast by sealing worn or drilled engine and exhaust passages with expansion plugs. We stock zinc plated steel concave, cup and shallow cup styles for a universal fit. Use concave plugs when you need a tight bite in thinner walls, go cup for deeper bores and shallow cup where clearance is tight.

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Cup Expansion Plugs
Cup Expansion Plugs
Zinc Plated Steel, Universal.
Item # Diameter Finish Package Qty
1/2" Cup Expansion Plug - 10 Pack
64303
1/2"
Zinc Plated
10
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9/16" Cup Expansion Plug - 10 Pack
64304
9/16"
Zinc Plated
10
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19/32" Cup Expansion Plug - 10 Pack
64305
19/32"
Zinc Plated
10
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5/8" Cup Expansion Plug - 10 Pack
64306
5/8"
Zinc Plated
10
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3/4" Cup Expansion Plug - 10 Pack
64307
3/4"
Zinc Plated
10
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7/8" Cup Expansion Plug - 10 Pack
64308
7/8"
Zinc Plated
10
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29/32" Cup Expansion Plug - 10 Pack
64309
29/32"
Zinc Plated
10
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15/16" Cup Expansion Plug - 10 Pack
64310
15/16"
Zinc Plated
10
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1" Cup Expansion Plug - 10 Pack
64311
1"
Zinc Plated
10
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1-1/8" Cup Expansion Plug - 10 Pack
64312
1-1/8"
Zinc Plated
10
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1-1/4" Cup Expansion Plug - 10 Pack
64314
1-1/4"
Zinc Plated
10
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1-3/8" Cup Expansion Plug - 10 Pack
64315
1-3/8"
Zinc Plated
10
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1-1/2" Cup Expansion Plug - 10 Pack
64316
1-1/2"
Zinc Plated
10
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1-5/8" Cup Expansion Plug - 10 Pack
64318
1-5/8"
Zinc Plated
10
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1-3/4" Cup Expansion Plug - 10 Pack
64320
1-3/4"
Zinc Plated
10
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1-7/8" Cup Expansion Plug - 10 Pack
64324
1-7/8"
Zinc Plated
10
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1-15/16" Cup Expansion Plug - 10 Pack
64325
1-15/16"
Zinc Plated
10
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2" Cup Expansion Plug - 10 Pack
64327
2"
Zinc Plated
10
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Shallow Cup Expansion Plugs
Shallow Cup Expansion Plugs
Zinc Plated Steel, Universal.
Item # Diameter Finish Package Qty
7/16" Shallow Cup Expansion Plugs - 10 Pack
64332
7/16"
Zinc Plated
10
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5/8" Shallow Cup Expansion Plug - 10 Pack
64335
5/8"
Zinc Plated
10
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1" Shallow Cup Expansion Plug - 10 Pack
64338
1"
Zinc Plated
10
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1-1/8" Shallow Cup Expansion Plug - 10 Pack
64339
1-1/8"
Zinc Plated
10
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1-1/2" Shallow Cup Expansion Plug - 10 Pack
64343
1-1/2"
Zinc Plated
10
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1-5/8" Shallow Cup Expansion Plugs - 10 Pack
64344
1-5/8"
Zinc Plated
10
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1-49/64" Shallow Cup Expansion Plug - 10 Pack
64349
1-49/64"
Zinc Plated
10
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2-1/64" Shallow Cup Expansion Plug - 10 Pack
64354
2-1/64"
Zinc Plated
10
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2-1/16" Shallow Cup Expansion Plug - 10 Pack
64356
2-1/16"
Zinc Plated
10
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Concave Expansion Plugs
Concave Expansion Plugs
Zinc Plated Steel, Universal.
Item # Diameter Finish Package Qty
3/8" Concave Expansion Plug - 10 Pack
64367
3/8"
Zinc Plated
10
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7/16" Concave Expansion Plug - 10 Pack
64368
7/16"
Zinc Plated
10
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1/2" Concave Expansion Plug - 10 Pack
64369
1/2"
Zinc Plated
10
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9/16" Concave Expansion Plug - 10 Pack
64370
9/16"
Zinc Plated
10
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5/8" Concave Expansion Plug - 10 Pack
64371
5/8"
Zinc Plated
10
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3/4" Concave Expansion Plug - 10 Pack
64373
3/4"
Zinc Plated
10
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13/16" Concave Expansion Plug - 10 Pack
64374
13/16"
Zinc Plated
10
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7/8" Concave Expansion Plug - 10 Pack
64375
7/8"
Zinc Plated
10
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15/16" Concave Expansion Plug - 10 Pack
64376
15/16"
Zinc Plated
10
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1" Concave Expansion Plug - 10 Pack
64377
1"
Zinc Plated
10
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1-1/16" Concave Expansion Plug - 10 Pack
64379
1-1/16"
Zinc Plated
10
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1-1/8" Concave Expansion Plug - 10 Pack
64380
1-1/8"
Zinc Plated
10
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1-1/4" Concave Expansion Plug - 10 Pack
64382
1-1/4"
Zinc Plated
10
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1-5/16" Concave Expansion Plug - 10 Pack
64383
1-5/16"
Zinc Plated
10
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1-3/8" Concave Expansion Plug - 10 Pack
64384
1-3/8"
Zinc Plated
10
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1-1/2" Concave Expansion Plug - 10 Pack
64387
1-1/2"
Zinc Plated
10
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1-5/8" Concave Expansion Plug - 10 Pack
64389
1-5/8"
Zinc Plated
10
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1-3/16" Concave Expansion Plug - 10 Pack
64381
1-13/16"
Zinc Plated
10
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2" Concave Expansion Plug - 10 Pack
64395
2"
Zinc Plated
10
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1/2" Cup Expansion Plug - 10 Pack
Cup Expansion Plugs
18 options | Item #: 64303
Price
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7/16" Shallow Cup Expansion Plugs - 10 Pack
Shallow Cup Expansion Plugs
9 options | Item #: 64332
Price
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3/8" Concave Expansion Plug - 10 Pack
Concave Expansion Plugs
19 options | Item #: 64367
Price
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