The Sleeve,directional Control Linea, cataloged under National Stock Number 4820-01-495-0028, 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 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-495-0028 |
| Primary Part Number | 551-7068554-6 |
| Item Name | Sleeve,directional Control Linea |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| 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 |
|---|---|
| 551-7068554-6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H845-1801-6 | 5/2 Secondary reference U.S. Government activity |
| 7068554 | D/9 Drawing number reference only Naval Sea Systems Command |
| H845-1801 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-495-0028 is a Sleeve,directional Control Linea, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-495-0028 has 1 manufacturer part number on file: 551-7068554-6 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-495-5781. Verify interchangeability with system specifications before substitution.
Key specifications for 551-7068554-6: Overall Length: 5.000 INCHES NOMINAL IN; Special Features: SLEEVE HAS 45 EQUALLY SPACED SLOTS 1.310 INCHES LONG CUT 0.940 INCHES FROM THE END; NHA TORPEDO TUBE BLOW AND VENT MANIFOLD ASSEMBLY IN; Part Name Assigned by Controlling Agency: SLEEVE; End Item Identification: LOS ANGELES CLASS SSN (688). 1 specification is 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.