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National Stock Number:
4820-00-180-5207
Federal Supply Class:
4820
National Item Identification Number:
001805207
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:
| 10161950 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | 16504 | 98656 | BENTON DIV AMBAC INDUSTRIES INC |
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Techincal Specification:
| BODY INSIDE DIAMETER | 0.250 INCHES NOMINAL | | BODY OUTSIDE DIAMETER | 0.557 INCHES MINIMUM AND 0.559 INCHES MAXIMUM | | FLANGE DIAMETER | 0.781 INCHES NOMINAL | | FLANGE SEAT TO DISK END HEIGHT | 0.098 INCHES MINIMUM AND 0.102 INCHES MAXIMUM | | HARDNESS RATING | 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL | | MATERIAL | STEEL COMP 440C OVERALL | | SEATING SURFACE SHAPE | FLAT | | STYLE DESIGNATOR | PLAIN FLANGED | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | UNDER FLANGE HEIGHT | 0.410 INCHES NOMINAL |
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