Plug Plastic

Enhance your heavy equipment’s performance with the Case Construction Plug Plastic #353-403. Designed for durability and precision, this essential component ensures optimal sealing and protection, keeping your machinery running smoothly in demanding environments. Perfect for Case equipment maintenance.

Compatible equipment

This part fits CASE CRAWLER TRACTOR, CASE TRENCHER, CASE CONSTRUCTION KING LOADER BACKHOE, CASE WHEEL LOADER (BEFORE S/N JEE0135500), CASE WHEEL LOADER (S/N JEE0135501 & AFTER) - ENGINE SUPPLEMENT, CASE WHEEL LOADER - NA (S/N JEE0135501 & AFTER), LOADER LANDSCAPER - LIVERY - TIER 4B, LOADER LANDSCAPER - TIER 4B, CASE CONSTRUCTION KING LOADER BACKHOE AFTER S/N 3739160 (EUROPE), SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C303000, BACKHOE LOADER (LIVERY) - TIER 3 NRC, BACKHOE LOADER (LIVERY) - TIER 4B, BACKHOE LOADER - TIER 3 NRC, BACKHOE LOADER - TIER 4A - FROM PIN NCC560000, BACKHOE LOADER - TIER 4B, BACKHOE LOADER 2WD - TIER 3 NRC - MY18, BACKHOE LOADER 2WD - TIER 3 NRC - MY19, BACKHOE LOADER 2WD - TIER 4B - MY18, BACKHOE LOADER 2WD - TIER 4B - MY19, BACKHOE LOADER 4WD - TIER 3 NRC - MY18, BACKHOE LOADER 4WD - TIER 3 NRC - MY19, BACKHOE LOADER 4WD - TIER 4B - MY18, BACKHOE LOADER 4WD - TIER 4B - MY19, LOADER BACKHOE (TIER 3), LOADER BACKHOE - TIER 3 NRC, CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE, CASE SUPER-E CONSTRUCTION KING LOADER BACKHOE, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C304000, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C307000, BACKHOE LOADER - TIER 4A - FROM PIN NCC564000, LOADER BACKHOE - TIER 3, BACKHOE LOADER (LIVERY) - WIDE TRACK - TIER 3 NRC, BACKHOE LOADER (LIVERY) - WIDE TRACK - TIER 4B, BACKHOE LOADER - WIDE TRACK - TIER 4B, BACKHOE LOADER 4WD - WIDE TRACK - TIER 3 NRC - MY18, BACKHOE LOADER 4WD - WIDE TRACK - TIER 3 NRC - MY19, BACKHOE LOADER 4WD - WIDE TRACK - TIER 4B - MY18, BACKHOE LOADER 4WD - WIDE TRACK - TIER 4B - MY19, BACKHOE LOADER WIDE TRACK - TIER 3, BACKHOE LOADER WIDE TRACK - TIER 3 NRC, BACKHOE LOADER WIDE TRACK - TIER 4A, SERIES 2 LOADER BACKHOE TIER 2 (NA) - ASN N4C309000, BACKHOE LOADER - TIER 4A, CASE WHEEL LOADER (PRIOR TO S/N JAK0021701) (NORTH AMERICA), CASE WHEEL LOADER (S/N JAK0021701 & AFTER) (NORTH AMERICA), CASE WHEEL LOADER (NORTH AMERICA), CASE WHEEL LOADER, CASE WHEEL LOADER (S/N JEE0155000 & BEFORE), CASE WHEEL LOADER (S/N JEE0155001 & AFTER), CASE TURBO TRENCHER, TRENCHER SUPPLEMENT (NORTH AMERICAN HOMOLOGATION), CASE UNIT LOADER including models 1150D, 1155D, 460, 480C, 480D, 480E, 480F, 521D, 560, 570N EP, 580C, 580D, 580E, 580F, 580G, 580M, 580N, 580N EP, 580SD, 580SE, 580SM, 580SN, 580SN WT, 590SM, 590SN.

Frequently asked questions

What is the part number?

The manufacturer part number is 353-403.

Is this a genuine OEM part?

Yes. Southeastern Equipment stocks OEM and quality aftermarket parts for heavy equipment. Contact us if you need a specific OEM source or aftermarket option.

Will this fit my machine?

See the compatible equipment list above. If your model is not listed, call us with your machine's serial number and we can confirm.

Where does this ship from?

Southeastern Equipment Company ships parts nationwide from our US warehouse. Orders placed before 2 PM ET typically ship same day.

Free pickup at any of our 17 branches across Ohio, Indiana, Michigan, and Kentucky. Select your preferred branch at checkout.

30-day no-fault returns. Bought the wrong part? Send it back for a full refund — no restocking fees, no minimums.