Replacement Square Track Nut (1/2") *It Is Up To You To Decide For Sure If This Item Fits Your Machine. If You Need Help, Please Call Or Email Us.* *Use This Nut If You Have Not Updated To 3/4" Track Bolts* *We Will Call And Verify Fit Before Shipping* Made To Fit The Following Applications: Bomag® Cold Planer: BM2000/60 Case® Crawler Tractor-Loader-Dozer: 450 (S/N: Up To 3050800), 450A (S/N: 3050801-3069100), 450B (S/N: 3069101-3076100), 450B LGP (S/N: 3069101-3076100), 450C (S/N: 3076101-Up), 450C LGP (36 & 39 Link - S/N: 3076101-Up), 450C LT (S/N: 3076101-Up), 455C, 550 LGP (S/N: Up To JAK0013967), 550 LT (S/N: JAK0013967) Caterpillar® Asphalt Paver: AP755 Caterpillar® Cold Planer: PM200, PM465 (S/N: 5ZS) Caterpillar® Crawler Tractor-Loader-Dozer: D2 (First Generation - Year