The Retainer,seal, cataloged under National Stock Number 4820-01-207-4858, 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 1 specification, 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. 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 | 4820-01-207-4858 |
| Primary Part Number | 255123 PIECE 11 |
| Item Name | Retainer,seal |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL IS NI-CU,QQ-N-281,CLASSA |
| 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 |
|---|---|
| 255123 PIECE 11 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 256348 PIECE 16 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
NSN 4820-01-207-4858 is a Retainer,seal, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-207-4858 has 2 manufacturer part numbers on file: 255123 PIECE 11 (Huntington Ingalls Inc Div Newport News Shipbuilding), 256348 PIECE 16 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-407-8681. Verify interchangeability with system specifications before substitution.
Key specifications for 255123 PIECE 11: General Characteristics Item Description: MATERIAL IS NI-CU,QQ-N-281,CLASSA. 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.