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National Stock Number:
4820-00-975-7128
Federal Supply Class:
4820
National Item Identification Number:
009757128
Description:
SEAT,VALVE
Detail:
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.
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Manufacturer Information:
| 42576 | 81873 | WOODWARD HRT INC | | 975-7128 | 59155 | MARINE DIESEL, INC. | | 9757128 | 59155 | MARINE DIESEL, INC. |
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Techincal Specification:
| STYLE DESIGNATOR | PLAIN | | FLANGE DIAMETER | 0.434 INCHES MINIMUM AND | | 0.436 INCHES MAXIMUM | | OVERALL HEIGHT | 0.250 INCHES NOMINAL | | BODY OUTSIDE DIAMETER | 0.248 INCHES MINIMUM AND | | 0.252 INCHES MAXIMUM | | FLANGE SEAT TO DISK END HEIGHT | 0.095 INCHES MINIMUM AND | | 0.105 INCHES MAXIMUM | | UNDER FLANGE HEIGHT | 0.145 INCHES MINIMUM AND | | 0.155 INCHES MAXIMUM | | BODY STEPPED INSIDE DIAMETER | 0.124 INCHES MINIMUM AND | | 0.126 INCHES MAXIMUM FIRST STEP | | 0.250 INCHES NOMINAL SECOND STEP | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,CLASS 440C FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND | | 60.0 ROCKWELL C MAXIMUM OVERALL | | SEATING SURFACE SHAPE | ANGULAR | | SEAT ANGLE IN DEG | 90.000 NOMINAL |
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