Sizes & How to Order

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How to Order Apple O-Rings

Apple O-rings and MicrOring^® seals are specified by three characteristics: size, hardness, and material. Prior to seal specification, please check for availability. We add to tooling list all the time.

SIZE: Standards are specified by their AS 568B dash number. Non-standards are referenced by I.D. and width(cross section). Click on the following links to reference the seal size tables you need. Standard AS 568B Size O-Rings, O-Rings Boss Gaskets for Straight Thread Tube Fitting, O-Ring Seal Sizes

HARDNESS: This is specified by a two-digit Shore A durometer number, ranging from 25(soft) to 90(hard), depending on the type of elastomer. Our standard durometer is 70 Shore A, except for Viton which is 75 Shore A. Standard durometer tolerance is ±5.

MATERIAL: Our standard range of materials is designated by a two-letter abbreviation for each elastomer. See Section 6 for designations and further discussions of materials.