The Stem,fluid Valve, cataloged under National Stock Number 4820-01-377-1035, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-377-1035 |
| Primary Part Number | 556-6408988-A-7 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Type for Which Designed | BALL |
| Largest Outside Diameter | 1.300 INCHES MINIMUM IN |
| Stem Actuating End Type | THREADED EXTERNALLY AND SLOTTED |
| Material Document and Classification | QQ-C-465, ALY C63200 FED SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | THREADED |
| Valve Size for Which Designed | 1.500 INCHES IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 556-6408988-A-7 PRIMARY | Naval Sea Systems Command (USA) |
| 6408988 FN A7 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 264378505 FN A-7 | 5/2 Secondary reference U.S. Government activity |
| 556-6408988-B-7 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-377-1035 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-377-1035 has 2 manufacturer part numbers on file: 556-6408988-A-7 (Naval Sea Systems Command), 6408988 FN A7 (Naval Sea Systems Command).
Key specifications for 556-6408988-A-7: Valve Type for Which Designed: BALL; Largest Outside Diameter: 1.300 INCHES MINIMUM IN; Stem Actuating End Type: THREADED EXTERNALLY AND SLOTTED; Material Document and Classification: QQ-C-465, ALY C63200 FED SPEC SINGLE MATERIAL RESPONSE. 7 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.