SealSpec / O-rings / Size chart / AS568-381

AS568-381 O-ring · 12 ID × 3/16 cross-section

Standard AS568 size -381: 11.975 in inside diameter × 0.210 in cross-section (304.17 × 5.33 mm). Dimensions, tolerances, groove check and material options for specifying this size in a production design.

AS568-381 O-ring dimensioned drawing, 11.975 inch ID by 0.210 inch cross-section, outside diameter 12.395 inch — Dimensioned drawing, proportional to ID/CSDownload SVG

Dimensions (inch)

Dash number	AS568-381
Inside diameter	11.975 ± 0.065
Cross-section	0.210 ± 0.005
Outside diameter (calculated)	12.395
Nominal	12 × 12 3/8 × 3/16

Dimensions (mm)

Inside diameter	304.17 ± 1.65
Cross-section	5.33 ± 0.13
Outside diameter (calc.)	314.83

Material options for -381

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

Check your groove for -381

Enter your gland dimensions. Results are nominal geometry.

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

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Same cross-section (0.210 in)

-377 9.975 -378 10.475 -379 10.975 -380 11.475 -381 11.975 -382 12.975 -383 13.975 -384 14.975 -385 15.955

← AS568-380 · AS568-382 → · Full size chart