| WILLIAM E WILLIAMS, VALVE CORP | 79342 |
| WILLIAM E WILLIAMS, VALVE CORP | 79342 |
| WILLIAM E WILLIAMS, VALVE CORP | 79342 |
| A replaceable item designed to provide a circular stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see INSERT, ENGINE VALVE SEAT. |
