The Valve,grease, cataloged under National Stock Number 4820-01-481-9641, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-481-9641 |
| Primary Part Number | DF298851 ASSY 91 |
| Item Name | Valve,grease |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DF298851 ASSY 91 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 801-6405227 ASSY 91 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 801-6405227 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-481-9641 is a Valve,grease, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-481-9641 has 2 manufacturer part numbers on file: DF298851 ASSY 91 (Huntington Ingalls Inc Div Newport News Shipbuilding), 801-6405227 ASSY 91 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-489-1122, 4820-01-496-4003. Verify interchangeability with system specifications before substitution.
Key specifications for DF298851 ASSY 91: Part Name Assigned by Controlling Agency: VALVE,GLOBE; End Item Identification: SEAWOLF CLASS SUBMARINE. 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.