LockThis aftermarket lock plate or lock tab retains a fastener or adjustment nut on forklift drivetrain components, including axle nuts, transmission output shafts, and pinion preload assemblies. It is bent against a flat on the nut to prevent rotation under load and vibration, and is a single-use part replaced during every rebuild. Independent forklift mechanics and drivetrain rebuild specialists are typical buyers. Sold as a crossover aftermarket replacement, not OEM. Confirm bore diameter, thickness, and tab geometry against your existing lock plate before installing, since lock plates vary across axle and transmission designs.Aftermarket replacement part, cross-references original part number AC01650-21212.Need help confirming fit? Call (562) 693-7748 with your serial number.Part number variants: AC01650-21212, ac01650-21212, AC0165021212, ac0165021212 ⚠ Warning: Some equipment has serial-number breaks that may not be reflected in the catalog. Contact us for clarification before ordering if uncertain.SCR Forklift Parts ships from Whittier, CA with next-day delivery available across the US when needed.