Cross-Reference：FS19895 P551033 BF1388-O 20853583 21380408
3909638M1 FS19897 WK1040 WK1040
| Outer Diameter | 4.22 inch (107.3 mm) |
| Thread Size | 1-14 UN |
| Length | 5.79 inch (147 mm) |
| Gasket OD | 3.90 inch (99 mm) |
| Gasket ID | 3.56 inch (90.3 mm) |
| Efficiency 99% | 10 micron |
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