Standard AS568 O-ring
AS568-243 O-Ring, 4.109 x 0.139 in (104.37 x 3.53 mm)
The AS568-243 O-ring (dash 243, also written 2-243) has an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), nominal 1/8 inch, and an outside diameter of 4.387 in (111.43 mm). We supply it in Buna-N (nitrile), Viton (FKM), EPDM or Silicone, in packs of 10, 25 and 100.
Size
| AS568 size | -243 |
|---|---|
| Inside diameter (ID) | 4.109 in (104.37 mm) |
| Cross section (CS) | 0.139 in (3.53 mm), nominal 1/8 in |
| Outside diameter (OD) | 4.387 in (111.43 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. | $5.99 | $9.99 | Request a quote |
| Viton (FKM) 75AGood for heat, fuels and many chemicals. | $14.99 | $34.99 | Request a quote |
| EPDM 70AGood for hot water, steam and chlorinated or chloraminated water. | $6.99 | $15.99 | $64.99 |
| Silicone 70A (orange)Good for a wide temperature range and food-contact use. | $7.99 | $15.99 | $66.99 |
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.