The Stem,needle Valve, cataloged under National Stock Number 4820-01-426-7015, 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 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-426-7015 |
| Primary Part Number | 801-6405539-13-9 ASSY 90 |
| Item Name | Stem,needle Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Largest Outside Diameter | 1.250 INCHES NOMINAL IN |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Material Document and Classification | QQ-C-465, ALY-C63000 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | NICKEL 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 |
|---|---|
| 210101850 | Naval Sea Systems Command (USA) |
| 801-6405539-13-9 ASSY 90 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405539 | D/9 Drawing number reference only Naval Sea Systems Command |
| 801-6405539-13- | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| DF2300-4423-13-9 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-426-7015 is a Stem,needle Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-426-7015 has 2 manufacturer part numbers on file: 210101850 (Naval Sea Systems Command), 801-6405539-13-9 ASSY 90 (Naval Sea Systems Command).
Key specifications for 801-6405539-13-9 ASSY 90: Largest Outside Diameter: 1.250 INCHES NOMINAL IN; Stem Actuating End Type: THREADED EXTERNALLY; Material Document and Classification: QQ-C-465, ALY-C63000 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 2.970 INCHES NOMINAL IN. 4 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.