Washer Lock

Enhance your heavy equipment’s performance with the Case Construction Washer Lock #40305. Designed for durability and precision, this essential part ensures secure fastening, reducing downtime and maintaining optimal functionality in demanding construction environments. Trust Case for reliability.

Compatible equipment

This part fits DAVIS TASKFORCE SUPER TRENCHER, WHEEL LOADER - STAGE V - TS - ZBAR, WHEEL LOADER - T4B - STD LINKAGE, WHEEL LOADER - T4B - XR LINKAGE, STD LINKAGE WHEEL LOADER STAGE 5, WHEEL LOADER - STAGE V - TS - XT, WHEEL LOADER - T4B - XT LINKAGE, ELECTRIC FOUR WHEEL DRIVE, MIDI CRAWLER EXCAVATOR, CAB - STAGE V, 4WD MOTOR GRADER ELECTRO-HYDRAULIC - STAGE V, 4WD MOTOR GRADER MY20 - STAGE V, 6WD MOTOR GRADER ELECTRO-HYDRAULIC - STAGE V, AWD MOTOR GRADER MY20 - STAGE V, MOTOR GRADER - ASN 020001, MOTOR GRADER TIER 2- BTW 020101-020187, MOTOR GRADER - ASN 022001, MOTOR GRADER TIER 2 - ASN 022101, MOTOR GRADER - ASN N5AF04007, MOTOR GRADER - ASN 024001, MOTOR GRADER TIER 2 - BTW 024102-024129, MIDI CRAWLER EXCAVATOR, 2 PIECE BOOM, CAB - STAGE V, MINI CRAWLER EXCAVATOR, CANOPY - STAGE V, MINI CRAWLER EXCAVATOR, CAB - STAGE V, MINI CRAWLER EXCAVATOR, CAB, JAPAN ENGINE - STAGE V - MY25, MINI CRAWLER EXCAVATOR, CANOPY, JAPAN ENGINE - STAGE V - MY25, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM, CAB - STAGE V, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM, CANOPY - STAGE V, MINI CRAWLER EXCAVATOR, CAB - STAGE V MY24, MINI CRAWLER EXCAVATOR, CANOPY - STAGE V MY26, MINI CRAWLER EXCAVATOR, 2 PIECE BOOM, CAB - STAGE V MY24, FLEETLINE 25+4 TRENCHER, MINOTAUR COMPACT DOZER LOADER, SNEAKER C - 25+4XP TRENCHER, IRRIGATION POWER UNIT, SKID STEER LOADER - TIER 3 - ROW, SKID STEER LOADER - TIER 4F - NA, SKID STEER LOADER - NRC, SKID STEER LOADER, SKID STEER LOADER - S5 NA, REGULATED NA - TIER 4 - MY26, REGULATED NA, TIER 4 - MY26, SV340B-RGV-AP, CASE TRENCHER, COMPACT TRACK LOADER - TIER 3 - ROW, COMPACT TRACK LOADER - TIER 4F - NA, COMPACT TRACK LOADER including models 1000, 1021G2, 1121G2, 521G2, 580EV, CX90E, 621G2, 721G2, 821G2, 836C, 836C AWD, 845, 865, 865 DHP, 885, 921G2, CX100E, CX12D, CX25D, CX28D, CX30D, CX34D, CX35D, CX38D, CX42D.

Frequently asked questions

What is the part number?

The manufacturer part number is 40305.

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.

Ships nationwide. In-stock parts ordered before 2:30 PM ET ship the same business day. Your exact shipping cost and delivery estimate are calculated at checkout from your ZIP code and the part’s size and weight; oversized and truck-freight items may need extra transit time and freight charges.

Free branch pickup is also available across Ohio, Indiana, Michigan, and Kentucky — just choose it at checkout.

30-day returns. New, unused parts in original packaging may be returned within 30 days. Some items — including electrical, special-order, and direct-from-supplier parts — are non-returnable. See our full return policy.