NSN 4820-00-858-9981 16083971, 1608397-1, 00-858-9981
Product Details | VALVE SEAT
4820-00-858-9981 A replaceable item designed to provide a 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.20248100015Valves, Powered48200018Valves, Nonpowered
Part Alternates: 16083971, 1608397-1, 4820-00-858-9981, 00-858-9981, 4820008589981, 008589981
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 01 JAN 1962 | 00-858-9981 | 22113 ( SEAT, VALVE ) |
Drawings & Photos | NSN 4820-00-858-9981
Cross Reference | NSN 4820-00-858-9981
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 1608397-1 | 99251 | CARLETON LIFE SUPPORT SYSTEMS INC. DBA COBHAM MISSION SYSTEM |
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Technical Data | NSN 4820-00-858-9981
| Characteristic | Specifications |
|---|---|
| STYLE DESIGNATOR | B10 PLAIN FLANGED |
| FLANGE DIAMETER | 0.254 INCHES MINIMUM AND 0.256 INCHES MAXIMUM |
| BODY INSIDE DIAMETER | 0.076 INCHES MINIMUM AND 0.080 INCHES MAXIMUM |
| FLANGE SEAT TO DISK END HEIGHT | 0.073 INCHES NOMINAL |
| UNDER FLANGE HEIGHT | 0.286 INCHES NOMINAL |
| MATERIAL | ALUMINUM ALLOY 2024 OVERALL |
| HARDNESS RATING | NOT RATED |
| SEATING SURFACE SHAPE | RADIAL |
| SEAT RADIUS | 0.016 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNEF SINGLE THREADED PORTION |
| NOMINAL THREAD SIZE | 0.250 INCHES SINGLE THREADED PORTION |
| THREAD QUANTITY PER INCH | 32 SINGLE THREADED PORTION |
| THREAD CLASS | 3A SINGLE THREADED PORTION |
| THREAD LENGTH | 0.187 INCHES NOMINAL SINGLE THREADED PORTION |
| MANUFACTURERS CODE | 99251 |
| DESIGN CONTROL REFERENCE | 1608397-1 |
Restrictions/Controls & Freight Information | NSN 4820-00-858-9981
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||