The Retainer,disk,valve, cataloged under National Stock Number 4820-01-414-6615, 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. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-414-6615 |
| Primary Part Number | 6553-256 PART 6 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Material Document and Classification | MIL-B-24059 AMEND 1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Nominal Thread Size | 2.875 INCHES IN |
| Valve Size for Which Designed | 6.000 INCHES IN |
| Valve Design Control Activity | 80064 |
| 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 |
|---|---|
| 6553-256 PART 6 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 208-4325726 PART 6 | 3/2 Design control — primary reference U.S. Government activity |
| 4325726 | D/9 Drawing number reference only U.S. Government activity |
| 208-4325726 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 6553-256 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-414-6615 is a Retainer,disk,valve, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-414-6615 has 1 manufacturer part number on file: 6553-256 PART 6 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-417-4948. Verify interchangeability with system specifications before substitution.
Key specifications for 6553-256 PART 6: Material Document and Classification: MIL-B-24059 AMEND 1 MIL SPEC SINGLE MATERIAL RESPONSE; Overall Length: 1.625 INCHES NOMINAL IN; Nominal Thread Size: 2.875 INCHES IN; Valve Size for Which Designed: 6.000 INCHES IN. 5 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.