Shim Rings - 12x18x1mm (DIN988) (bag of 25pc)

DIN 988 12x18x1 designates a metric precision shim ring (or spacer washer) built according to German industrial normalization standards. These are ultra-precise flat washers designed to eliminate axial play, calibrate spacing, or level out tight components within a mechanical assembly.  We purchased these years ago (made in Germany) for use with the big brake kits for centering calipers during installations. Selling off my old hardware. (9g)

The dimensions are:

• Inner Diameter (ID): 12 mm
• Outer Diameter (OD): 18 mm
• Thickness: 1.0 mm 

These are also used with vehicle drivetrains and assemblies. A 12mm x 18mm x 1mm shim is typically utilized to adjust strict clearances on high-wear rotating machinery:

• Transmission & Shift Linkage: Calibrating shaft end-play or taking up structural slop inside vintage gearboxes and selector rod pivots.
• Rotary Bearings & Small Shafts: Properly preloading or spacing out small gears, pulleys, and needle bearings on a 12mm shaft.
• Powersports & Small Engines: Widely used in vintage engines, motorcycle/scooter wheel hubs, and generator assemblies to secure component spacing