SealSpec / O-rings / Size chart / AS568-242

AS568-242 O-ring · 4 ID × 1/8 cross-section

Standard AS568 size -242: 3.984 in inside diameter × 0.139 in cross-section (101.19 × 3.53 mm). Dimensions, tolerances, groove check and material options for specifying this size in a production design.

AS568-242 O-ring dimensioned drawing, 3.984 inch ID by 0.139 inch cross-section, outside diameter 4.262 inch — Dimensioned drawing, proportional to ID/CSDownload SVG

Dimensions (inch)

Dash number	AS568-242
Inside diameter	3.984 ± 0.028
Cross-section	0.139 ± 0.004
Outside diameter (calculated)	4.262
Nominal	4 × 4 1/4 × 1/8

Dimensions (mm)

Inside diameter	101.19 ± 0.71
Cross-section	3.53 ± 0.10
Outside diameter (calc.)	108.25

Material options for -242

Viton / FKM Nitrile / Buna-N EPDM Silicone Fluorosilicone Neoprene

Check your groove for -242

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Groove depth (in)Groove width (in)Installed ID / rod (in)

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Same cross-section (0.139 in)

-238 3.484 -239 3.609 -240 3.734 -241 3.859 -242 3.984 -243 4.109 -244 4.234 -245 4.359 -246 4.484

← AS568-241 · AS568-243 → · Full size chart