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National Stock Number:
4820-01-213-7406
Federal Supply Class:
4820
National Item Identification Number:
012137406
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:
| 27642 | 16780 | EATON AEROSPACE LLC |
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Techincal Specification:
| STYLE DESIGNATOR | PLAIN FLANGED | | FLANGE DIAMETER | 0.419 INCHES MINIMUM AND | | 0.420 INCHES MAXIMUM | | BODY OUTSIDE DIAMETER | 0.309 INCHES MINIMUM AND | | 0.310 INCHES MAXIMUM | | BODY INSIDE DIAMETER | 0.187 INCHES NOMINAL | | FLANGE SEAT TO DISK END HEIGHT | 0.1315 INCHES NOMINAL | | UNDER FLANGE HEIGHT | 0.099 INCHES NOMINAL | | MATERIAL | STEEL COMP 17-4PH OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND | | 45.0 ROCKWELL C MAXIMUM OVERALL | | SEATING SURFACE SHAPE | FLAT | | SPECIAL FEATURES | BODY 0.187 IN. ID TAPERING TO 0.085 - 0.086 IN BORE THRU 0.126 IN. OD BOSS 0.0300 IN. H W/16 MICHROINCH FINISH,UPPER SEAT | | FSC APPLICATION DATA | ACFT ENG FUEL SYSTEM COMPONENTS | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 16780 | | DESIGN CONTROL REFERENCE | 27642 |
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