12LW - 1/2" Brake Lock Washer

The 12LW Brake Lock Washer is a hardened steel washer designed to prevent nut loosening under vibration and torque in brake and suspension assemblies. Its serrated design grips the mounting surface and fastener, ensuring reliable retention in critical trailer applications.

Features:

• ½″ inside diameter for use with ½″ bolts and studs
• Hardened steel construction for maximum strength
• Serrated/lock washer profile to resist vibration-induced loosening
• Zinc-plated finish for corrosion resistance
• Ideal for brake assemblies, axle mounts, and suspension hardware

Specifications:

• Part Number: 12LW
• Type: Brake lock washer (serrated)
• Inner Diameter (ID): 0.500″
• Outer Diameter (OD): 0.875″ (approximate)
• Thickness: 0.080″
• Material: Hardened steel
• Finish: Zinc-plated

Fitment & Applications:

• Compatible with ½″-16 and ½″-20 UNC/UNF fasteners
• Used in drum brake backer plates, hub assemblies, and suspension U-bolt kits
• Prevents nut back-off under heavy vibration and load
• Works with Dexter®, Lippert®, and industry-standard trailer hardware