1438149 Locknut Special Fits Caterpillar Models
1438149 Locknut Special Fits Caterpillar Models
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One New Aftermarket Replacement Locknut Special for Caterpillar (Cat) Excavators
This special locknut (Caterpillar part number 143-8149, also formatted as 143-8149) is an M48 x 2mm hex lock nut used across a wide range of Caterpillar (Cat) hydraulic excavators. It serves as a secure fastening component in excavator assemblies, providing reliable thread locking under the high-vibration and heavy-load conditions typical of construction and demolition applications.
Compatible Models
Caterpillar Excavators: 308C, 308D, 311B, 311C, 311D LRR, 312B, 312B L, 312C, 312C L, 313B, 314C, 315, 320B, 320C, 320D, 322C, 323D L, 324D, 324D L, 325C, 325C L, 325D, 325D L, 329D L, 330B L, 330C, 330C L
Caterpillar Wheeled Excavators: M312, M313C
Replaces Part Number(s):
1438149, 143-8149, CA1438149
New aftermarket replacement part - not remanufactured, not used.
