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National Stock Number:
4820-00-739-1777
Federal Supply Class:
4820
National Item Identification Number:
007391777
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:
| 66-4908 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| STYLE DESIGNATOR | PLAIN FLANGED | | FLANGE DIAMETER | 1.175 INCHES MINIMUM AND | | 1.180 INCHES MAXIMUM | | BODY OUTSIDE DIAMETER | 0.750 INCHES NOMINAL | | BODY INSIDE DIAMETER | 0.630 INCHES NOMINAL | | FLANGE SEAT TO DISK END HEIGHT | 0.440 INCHES MINIMUM AND | | 0.445 INCHES MAXIMUM | | UNDER FLANGE HEIGHT | 0.495 INCHES MINIMUM AND | | 0.500 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4130 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | HARDNESS RATING | 27.0 ROCKWELL C MINIMUM AND | | 33.0 ROCKWELL C MAXIMUM OVERALL | | SEATING SURFACE SHAPE | FLAT | | SEAL ACCOMMODATION TYPE | GROOVED | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 81205 | | DESIGN CONTROL REFERENCE | 66-4908 |
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