Hex Bolt Grade 5

Enhance your heavy equipment’s durability with the Case Construction Hex Bolt – Grade 5 #280373. Engineered for strength and reliability, this high-quality bolt ensures secure connections, making it essential for maintaining optimal performance in demanding construction environments.

Compatible equipment

This part fits WINCH, BACKHOE, LOADER, CASE/BELOIT SKID KING WHEEL LOADER, CASE CRAWLER TRACTOR, BACKHOE FOR W7, W9A, W9B, W10, CASE WHEEL TRACTOR, BACKHOE FOR W SERIES RIGID LOADERS, BACKHOES FOR CRAWLER MODELS 750, 850, 1150, CASE WHEEL TRACTOR W/LOADER BACKHOE, CASE CONSTRUCTION KING WHEEL TRACTOR, CASE CONSTRUCTION KING LOADER BACKHOE, CASE TERRATRAC CRAWLER TRACTOR, 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, CASE SUPER-D CONSTRUCTION KING LOADER BACKHOE, CASE CONSTRUCTION KING FORKLIFT, CASE TERRATRAC GASOLINE CRAWLER TRACTOR, CASE TRENCHER, CASE TURBO TRENCHER, MINI CRAWLER EXCAVATOR, CASE BACKHOE, CASE FORKLIFT, CASE UNIT LOADER, CASE WHEEL LOADER including models 19, 26, 26B, 26S, 300, 31, 310C, 310E, 32, 320B, 34, 400, 420B, 420BD, 480B, 480C, 500, 520, 580B, 580C, 580D, 580G, 580SD, 584C, 585C.

Frequently asked questions

What is the part number?

The manufacturer part number is 280373.

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.