SealSpec / O-rings / Size chart / AS568-040

AS568-040 O-ring · 2 7/8 ID × 1/16 cross-section

Standard AS568 size -040: 2.864 in inside diameter × 0.070 in cross-section (72.75 × 1.78 mm). Dimensions, tolerances, groove check and material options for specifying this size in a production design.

AS568-040 O-ring dimensioned drawing, 2.864 inch ID by 0.070 inch cross-section, outside diameter 3.004 inch — Dimensioned drawing, proportional to ID/CSDownload SVG

Dimensions (inch)

Dash number	AS568-040
Inside diameter	2.864 ± 0.020
Cross-section	0.070 ± 0.003
Outside diameter (calculated)	3.004
Nominal	2 7/8 × 3 × 1/16

Dimensions (mm)

Inside diameter	72.75 ± 0.51
Cross-section	1.78 ± 0.08
Outside diameter (calc.)	76.30

Material options for -040

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

Check your groove for -040

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 (0.070 in)

-036 2.364 -037 2.489 -038 2.614 -039 2.739 -040 2.864 -041 2.989 -042 3.239 -043 3.489 -044 3.739

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