Product Name: Lock Washer, M12 (Part No. 49883499)

Description:
This component is a standard M12 lock washer used in the assembly of mechanical components and hydraulic systems within waterjet cutting equipment. It is a thin, split-ring or toothed circular fastener placed under a nut or bolt head to provide a locking action that prevents loosening due to vibration. The "M12" designation indicates compatibility with 12 millimeter diameter metric bolts or studs.

In waterjet systems, this lock washer is used with M12 socket head screws or hex nuts to secure critical components such as heat exchangers, motor mounts, and frame assemblies. It is a non-wear component, meaning it does not have a scheduled replacement interval and is typically reused unless deformed.

Applications:

• Used under hex nuts or socket head cap screws on M12 fasteners in waterjet pump assemblies, heat exchangers, motor mounts, and frame connections

• Provides vibration resistance to prevent fastener loosening during high-pressure pump operation

• Suitable for general mechanical fastening applications within both pure water and abrasive waterjet systems

• Used specifically with M12 socket head screws (e.g., 10134278) and flat washers (e.g., 49898729) in hydraulic power packages

Features:

• M12 nominal size indicates compatibility with 12 millimeter diameter metric bolts or studs

• Typically manufactured from steel with zinc or black coating for corrosion resistance

• May feature a split helical design that provides spring tension to prevent loosening from vibration

• Precision-stamped to dimensional standards (e.g., DIN 6797A or DIN 6797J) for consistent fit

• Hardness rating ensures the washer maintains spring tension without permanent deformation

Maintenance:

• During disassembly, inspect the lock washer for signs of permanent deformation, cracking, or loss of spring tension

• A flattened or cracked lock washer will not provide effective vibration resistance and should be replaced

• While lock washers are sometimes reused, replacement with a new washer is recommended for critical high-vibration applications

• When reassembling, place the lock washer between the bolt head/nut and the bearing surface (or under a flat washer) as specified in the equipment service manual

• Ensure the washer is correctly oriented: split ring washers have no directional orientation; toothed washers typically have teeth facing the softer mating surface

• Tighten the fastener assembly to the torque value specified by the equipment manufacturer; the lock washer must be fully compressed to function properly

• Always fully depressurize both the hydraulic system and the high-pressure water system before disassembling any secured components

• Cross-reference part numbers: 49883499 is listed as Item 29 in heat exchanger assembly parts diagrams for waterjet systems