NUT CROWNLOCK 7/8-9 GRADE C (Yale YT220075393)

A damaged crownlock nut can compromise threaded joint security in mechanical assemblies. During installation, this aftermarket replacement part—cross-referenced to Yale part number YT220075393—provides a prevailing-torque locking feature that resists loosening from vibration. The 7/8-9 thread size and Grade C hardness rating indicate its suitability for heavy-duty fastening applications. If the locking element wears or deforms, the nut may fail to maintain clamp load, leading to joint separation. This type of nut is commonly used where periodic disassembly is required but vibration resistance is critical. The item ships at approximately 0.17 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: YT220075393, yt220075393