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National Stock Number:
4820-01-508-4551
Federal Supply Class:
4820
National Item Identification Number:
015084551
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:
| 1880-00 | 55378 | TRAC REGULATOR CO., INC. | | 40737-2 | 55378 | TRAC REGULATOR CO., INC. | | 40737-2 PC NO 17 | 55378 | TRAC REGULATOR CO., INC. |
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Techincal Specification:
| BODY INSIDE DIAMETER | 4.023 INCHES NOMINAL | | FLANGE DIAMETER | 5.1250 INCHES NOMINAL | | FLANGE SEAT TO DISK END HEIGHT | 0.3995 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281, CLASS B-COLD-FORM I FED SPEC SINGLE MATERIAL RESPONSE SEAT | | MATERIAL | NICKEL ALLOY R-405 SEAT | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SEAT RING | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD SIZE | 4.6250 INCHES SINGLE THREADED PORTION | | SEAL ACCOMMODATION TYPE | RECESSED | | SEATING SURFACE SHAPE | ANGULAR | | SEAT ANGLE IN DEG | 22.000 NOMINAL | | SPECIAL FEATURES | JSEAT RING, MATERIAL IS MONEL, CLASS B-COLD-FORM I. NEXT HIGHER ASSEMBLY IS NSN 4820-01-198-2855, P/N 40737-201: VALVE, REGULATING, FLUID PRESSURE; MATERIAL IS BRONZE; OUTLET PRESSURE RANGE IS 35.0 TO 55.0 PSI. | | STYLE DESIGNATOR | FAUCET | | THREAD CLASS | 3A SINGLE THREADED PORTION | | THREAD LENGTH | 0.5625 INCHES NOMINAL SINGLE THREADED PORTION | | THREAD QUANTITY PER INCH | 14 SINGLE THREADED PORTION | | THREAD SERIES DESIGNATOR | UNS SINGLE THREADED PORTION | | UNDER FLANGE HEIGHT | 0.5625 INCHES NOMINAL |
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