SealSpec / O-rings / Size chart / AS568-320

AS568-320 O-ring · 1 1/8 ID × 3/16 cross-section

Standard AS568 size -320: 1.100 in inside diameter × 0.210 in cross-section (27.94 × 5.33 mm). Dimensions, tolerances, groove check and material options for specifying this size in a production design.

AS568-320 O-ring dimensioned drawing, 1.100 inch ID by 0.210 inch cross-section, outside diameter 1.520 inch — Dimensioned drawing, proportional to ID/CSDownload SVG

Dimensions (inch)

Dash number	AS568-320
Inside diameter	1.100 ± 0.012
Cross-section	0.210 ± 0.005
Outside diameter (calculated)	1.520
Nominal	1 1/8 × 1 1/2 × 3/16

Dimensions (mm)

Inside diameter	27.94 ± 0.30
Cross-section	5.33 ± 0.13
Outside diameter (calc.)	38.61

Material options for -320

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

Check your groove for -320

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)

-316 0.850 -317 0.912 -318 0.975 -319 1.037 -320 1.100 -321 1.162 -322 1.225 -323 1.287 -324 1.350

← AS568-319 · AS568-321 → · Full size chart