SealSpec / O-rings / Size chart / AS568-254

AS568-254 O-ring · 5 1/2 ID × 1/8 cross-section

Standard AS568 size -254: 5.484 in inside diameter × 0.139 in cross-section (139.29 × 3.53 mm). Dimensions, tolerances, groove check and material options for specifying this size in a production design.

AS568-254 O-ring dimensioned drawing, 5.484 inch ID by 0.139 inch cross-section, outside diameter 5.762 inch — Dimensioned drawing, proportional to ID/CSDownload SVG

Dimensions (inch)

Dash number	AS568-254
Inside diameter	5.484 ± 0.035
Cross-section	0.139 ± 0.004
Outside diameter (calculated)	5.762
Nominal	5 1/2 × 5 3/4 × 1/8

Dimensions (mm)

Inside diameter	139.29 ± 0.89
Cross-section	3.53 ± 0.10
Outside diameter (calc.)	146.35

Material options for -254

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

Check your groove for -254

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 (0.139 in)

-250 4.984 -251 5.109 -252 5.234 -253 5.359 -254 5.484 -255 5.609 -256 5.734 -257 5.859 -258 5.984

← AS568-253 · AS568-255 → · Full size chart