Lock Washer

Enhance the durability of your heavy equipment with the Case Construction Lock Washer #493-21020. Designed for optimal performance, this reliable component ensures secure fastening, reducing wear and tear in demanding construction environments. Trust Case for quality and longevity.

Compatible equipment

This part fits WHEEL LOADER STD LINKAGE - STAGE V - 2025 UPDATES, DRIVE - WHEEL LOADER STD LINKAGE - STAGE V - 2025 UPDATES, WHEEL LOADER - STAGE V - TS - ZBAR, WHEEL LOADER - T4B - STD LINKAGE, WHEEL LOADER - T4B - XR LINKAGE, CASE CRAWLER EXCAVATOR, CASE CRUZ-AIR WHEELED EXCAVATOR, STD LINKAGE WHEEL LOADER STAGE 5, CASE CRAWLER TRACTOR, CRAWLER DOZER, CASE LOGGER CRAWLER EXCAVATOR, CASE FELLER/BUNCHER CRAWLER EXCAVATOR, SERIES - CASE UNI-LOADER SKID STEER LOADER, CASE UNI-LOADER SKID STEER LOADER, CASE UNI-LOADER SKID STEER LOADER W/DEUTZ ENGINE, CASE GASOLINE ENGINE, 4 CYLINDER DIESEL ENGINE, DIESEL ENGINE SUPPLEMENT, BACKHOE, LOADER, BACKHOE AND LOADER FOR 530CK TRACTORS, BACKHOE AND LOADER, BACKHOE FOR 310G AND 450 CRAWLER, BACKHOE FOR 580CK, BACKHOES FOR CRAWLER MODELS 750, 850, 1150, BACKHOE FOR 450, 450B, 850, 850B, AND W14, CASE TRENCHER, CASE LOADER/LANDSCAPER TRACTOR, DROTT SERIES-B FELLER/BUNCHER CRAWLER EXCAVATOR, DROTT SERIES-A CRAWLER EXCAVATOR, DROTT SERIES-B CRAWLER EXCAVATOR, CASE SKID STEER LOADER, SKID STEER - 410 NA BSN N7M480924, 410 EU BSN N7M468736, SKID STEER - SERIES 3, 410 NA ASN N7M480924, 410 EU ASN N7M468736, SKID STEER - 420NA BSN N7M466710, 420EU BSN N8M466713, COMPACT TRACK LOADER - BSN N7M455401, COMPACT TRACK LOADER - SERIES 3, ASN N7M455401, SKID STEER BSN 430 NA N7M479683, 430 EU N7M479546, CASE CONSTRUCTION KING WHEEL TRACTOR, SKID STEER - BSN N7M425032, SKID STEER - 440 NA BSN N8M474469, 440 EU BSN N8M407542, SKID STEER - SERIES 3, 440 NA ASN N8M474469, 440 EU ASN N8M407542, COMPACT TRACK LOADER - BSN N7M483467, COMPACT TRACK LOADER - SERIES 3, ASN N7M483467, SKID STEER - BSN N7M454787, COMPACT TRACK LOADER - BSN N8M458846, SKID STEER, TIER 2, P.I.N. N7M458414 & PRIOR, COMPACT TRACK LOADER - BSN N7M464019, SKID STEER BSN N7M452623, CASE CONSTRUCTION KING LOADER BACKHOE, CASE LOAD KING WHEEL LOADER, WHEEL LOADER - STAGE V - TS - XT, WHEEL LOADER - T4B - XT LINKAGE, CASE LONG TRACK CRAWLER TRACTOR, IND - CASE CRAWLER TRACTOR, LOADER LANDSCAPER, SERIES 3 LOADER LANDSCAPER TIER 3 - ASN N8C510600, BACKHOE LOADER, CASE CONSTRUCTION KING FORKLIFT, CASE CONSTRUCTION KING TRACTOR W/SHUTTLE TRANSMISSION, CASE CONSTRUCTION KING WHEEL TRACTOR W/HYDROSTATIC TRANSMISSION, CASE CONSTRUCTION KING LOADER BACKHOE - 4WD SUPPLEMENT, CASE CONSTRUCTION KING LOADER BACKHOE - TURBO SUPPLEMENT, SERIES 2 LOADER BACKHOE - ASN JJG0239360, CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE, CASE SUPER-E CONSTRUCTION KING LOADER BACKHOE, CASE SUPER-K CONSTRUCTION KING LOADER BACKHOE, LOADER BACKHOE - BSN JJG0239361, CASE FORKLIFT, FORKLIFT - LIVERY, FORKLIFT, TURBO LOADER BACKHOE, LOADER BACKHOE, SERIES 2 LOADER BACKHOE - ASN JJG0210575, CASE SKID KING WHEEL LOADER, CASE TERRATRAC GASOLINE CRAWLER TRACTOR, CASE WHEEL LOADER, SERIES 1 CRAWLER - 07/01/2002 - 01/31/2005, SERIES 2 CRAWLER TIER 2 - 01/21/2005 - 06/16/2006, SERIES 3 CRAWLER TIER 2 - 06/20/2006 - 12/31/2008, CASE TELESCOPIC HANDLER, CASE WHEEL LOADER TIER 3, WHEEL LOADER TIER3 ZBAR EC4 - BR, WHEEL LOADER TIER3 ZBAR EC4 FERTILIZER - BR, WHEEL LOADER TIER3 ZBAR EC4 SUGARCANE BAGASSE - BR, CRAWLER DOZER TIER 3, WHEEL LOADER TIER 3 NA/EU, MOTOR GRADER TIER 2- BTW 020101-020187, CASE TURBO TRENCHER, MOTOR GRADER TIER 2 - ASN 022101, MOTOR GRADER TIER 2 - BTW 024102-024129, TRENCHER - CASE 188 DIESEL ENGINE, TRENCHER - CASE 207 DIESEL ENGINE, SNEAKER - SERIES-C TRENCHER, CASE UNIT LOADER, CASE ARTICULATED WHEEL LOADER including models 1021G, 1021G X, 1021G2, 1080, 1080B, 1085B, 1085C, 1086B, 1121G, 1121G X, 1121G2, 1150B, 1150D, 1150E, 1150G, 1150H, 1150M LT, 1150M WT, 1150M WT/LGP, 1155D, 1155E, 1187, 1187B, 1187C, 1280.

Frequently asked questions

What is the part number?

The manufacturer part number is 493-21020.

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.