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ISO 3601 Series A (CS 1.80 mm) — dimension table

The Series A (CS 1.80 mm) series of the ISO 3601 standard: 78 O-ring sizes. Each row lists the inner diameter (ID), cross-section (CS), outer diameter (OD) and a link to the matching O-ring in the catalogue.

ID = Inner diameter (ID, mm) · CS = Cross-section (CS, mm) · OD = Outer diameter (OD, mm)

O-ring dimensions — ISO 3601 Series A (CS 1.80 mm)
DesignationInner diameter (ID, mm)Cross-section (CS, mm)Outer diameter (OD, mm)Catalogue product
A00181.81.85.4Nearest product2 × 1.8 mm
A002021.85.6Choose material
A00222.241.85.84Nearest product2 × 1.8 mm
A00252.51.86.1Nearest product2.57 × 1.78 mmLast few
A00282.81.86.4Nearest product2.9 × 1.78 mm
A00323.151.86.75Nearest product3 × 1.8 mm
A00363.551.87.15Nearest product3.68 × 1.78 mm
A00383.751.87.35Nearest product3.68 × 1.78 mm
A004041.87.6View product
A00454.51.88.1View productLast few
A00494.871.88.47Nearest product4.76 × 1.78 mm
A005051.88.6Choose material
A00525.151.88.75Nearest product5.28 × 1.78 mm
A00535.31.88.9View product
A00565.61.89.2Nearest product5.7 × 1.9 mm
A006061.89.6Choose material
A00636.31.89.9Nearest product6 × 1.8 mm
A00676.71.810.3Nearest product6.9 × 1.8 mm
A00696.91.810.5Choose material
A00717.11.810.7Nearest product6.9 × 1.8 mm
A00757.51.811.1Nearest product7.65 × 1.78 mm
A008081.811.6Choose material
A00858.51.812.1Nearest product9 × 1.8 mm
A00888.751.812.35Nearest product9 × 1.8 mm
A009091.812.6Choose material
A00959.51.813.1Nearest product9.25 × 1.78 mm
A0100101.813.6Choose material
A010610.61.814.2Nearest product10.52 × 1.8 mm
A011211.21.814.8Choose material
A011811.81.815.4Choose material
A012512.51.816.1Choose material
A013213.21.816.8Nearest product13 × 1.8 mm
A0140141.817.6View product
A0150151.818.6Choose material
A0160161.819.6Choose material
A0170171.820.6Nearest product17.17 × 1.78 mm
A0180181.821.6Choose material
A0190191.822.6Nearest product18.77 × 1.78 mm
A0200201.823.6Choose material
A021221.21.824.8Nearest product21 × 2 mm
A022422.41.826Nearest product22 × 1.8 mm
A023623.61.827.2Nearest product23.52 × 1.78 mm
A0250251.828.6Nearest product25.12 × 1.78 mm
A025825.81.829.4Nearest product26 × 2 mm
A026526.51.830.1Nearest product26.7 × 1.78 mm
A0280281.831.6Nearest product28.3 × 1.78 mm
A0300301.833.6Choose material
A031531.51.835.1View product
A032532.51.836.1Nearest product33.05 × 1.78 mm
A033533.51.837.1Nearest product33.5 × 2 mm
A034534.51.838.1View product
A035535.51.839.1Nearest product35 × 2 mm
A036536.51.840.1Nearest product36 × 2 mm
A037537.51.841.1Nearest product37.82 × 1.78 mm
A038738.71.842.3Nearest product39 × 2 mm
A0400401.843.6Nearest product40 × 2 mm
A041241.21.844.8Nearest product42 × 2 mm
A042542.51.846.1Nearest product42 × 2 mm
A043743.71.847.3Nearest product44.17 × 1.78 mm
A0450451.848.6Nearest product45 × 2 mm
A047547.51.851.1Nearest product47.37 × 1.78 mm
A0500501.853.6Nearest product50 × 2 mm
A0530531.856.6Nearest product53 × 2 mm
A0560561.859.6Nearest product56 × 2 mm
A0600601.863.6View product
A0630631.866.6Nearest product63.22 × 1.78 mm
A0670671.870.6Nearest product66.4 × 1.78 mm
A0710711.874.6Nearest product72 × 2 mm
A0750751.878.6Nearest product75 × 2 mm
A0800801.883.6Nearest product80 × 2 mm
A0850851.888.6Nearest product85 × 2 mm
A0900901.893.6Nearest product90 × 2 mm
A0950951.898.6View product
A10001001.8103.6Nearest product100 × 2 mm
A10601061.8109.6Nearest product105 × 2 mm
A11201121.8115.6Nearest product112 × 1.5 mmLast few
A11801181.8121.6Nearest product119.5 × 2 mm
A12501251.8128.6Nearest product125 × 2 mm

Dimensions match the published tables of the ISO 3601 standard. Outer diameter is computed as ID + 2 × cross-section.