SealSpec / O-rings / Size chart / AS568-443

AS568-443 O-ring · 7 1/2 ID × 1/4 cross-section

Standard AS568 size -443: 7.475 in inside diameter × 0.275 in cross-section (189.87 × 6.99 mm). Dimensions, tolerances, groove check and material options for specifying this size in a production design.

AS568-443 O-ring dimensioned drawing, 7.475 inch ID by 0.275 inch cross-section, outside diameter 8.025 inch — Dimensioned drawing, proportional to ID/CSDownload SVG

Dimensions (inch)

Dash number	AS568-443
Inside diameter	7.475 ± 0.045
Cross-section	0.275 ± 0.006
Outside diameter (calculated)	8.025
Nominal	7 1/2 × 8 × 1/4

Dimensions (mm)

Inside diameter	189.87 ± 1.14
Cross-section	6.99 ± 0.15
Outside diameter (calc.)	203.84

Material options for -443

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

Check your groove for -443

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

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Same cross-section (0.275 in)

-439 6.475 -440 6.725 -441 6.975 -442 7.225 -443 7.475 -444 7.725 -445 7.975 -446 8.475 -447 8.975

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