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Watch Gaskets Extra Large O-Ring Gasket Assortment, .50 and .70 Thickness (60 Pieces)

O-ring gasket assortment
O-ring gasket assortment
Your Price: $37.32
Item Number: 84.312

This o-ring watch case back seal assortment is a great gasket kit for watchmakers and others who work on watch case backs. These round gaskets are made of solid tube rubber to create an airtight seal and are flexible enough to fit not only round watch case backs but, square, rectangle and other fancy shaped case backs. This new assortment is available in extra large sizes to fit the new extra large watch cases. The thicknesses are .50 mm and .70 mm and the inside diameters range from 33 mm to 42 mm. Refills available.

  • Assortment contains 20 different o-ring sizes in 2 different thicknesses
  • **Note** Diameter measured is the interior diameter of the gasket
  • In .50 mm thickness there are 10 different sizes: 33, 34, 35, 36, 37, 38, 39, 40, 41, and 42 mm
  • In .70 mm thickness there are 10 different sizes: 33, 34, 35, 36, 37, 38, 39, 40, 41, and 42 mm
  • Contains 3 of each size
  • Can easily be reordered by size in the following format: thickness- inside mm diameter (35-1800)
  • Refills are available in packages of 3
  • Kit has a total of 60 pieces
  • O-rings fit a variety of watch case backs from round to square
  • Maintain airtight seal
  • Extra large size o-rings
  • Made of rubber


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Gaskets are an essential watch part that maintains the water resistance of watches. This is a great o-ring gasket assortment for watchmakers. It has 60 gasket sizes in 3 thicknesses, ensuring that you always have the right gasket during a watch repair.

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