Standard AS568 O-ring
AS568-443 O-Ring, 7.475 x 0.275 in (189.87 x 6.99 mm)
The AS568-443 O-ring (dash 443, also written 2-443) has an inside diameter of 7.475 in (189.87 mm), a cross section of 0.275 in (6.99 mm), nominal 1/4 inch, and an outside diameter of 8.025 in (203.85 mm). We supply it in Buna-N (nitrile) or Silicone, in packs of 10, 25 and 100.
Size
| AS568 size | -443 |
|---|---|
| Inside diameter (ID) | 7.475 in (189.87 mm) |
| Cross section (CS) | 0.275 in (6.99 mm), nominal 1/4 in |
| Outside diameter (OD) | 8.025 in (203.85 mm) |
Rubber and pack prices
| Rubber | 10-pack | 25-pack | 100-pack |
|---|---|---|---|
| Buna-N (nitrile) 70AGood for water, air and petroleum oils; the usual choice for filter housings. | $15.99 | Request a quote | Request a quote |
| Silicone 70A (orange)Good for a wide temperature range and food-contact use. | $45.99 | Request a quote | Request a quote |
A size match is not a fit claim for your equipment. Some sizes ship from stock; others have a 2-3 business day lead time before they ship. Not for oxygen, medical, aviation, scuba or other safety-critical use.