The Retaining Plate Assembly, cataloged under National Stock Number 4820-01-215-2268, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-215-2268 |
| Item Name | Retaining Plate Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL COPPER ALLOY QQ-N-286 PLATE,43689 4901;TUNGSTEN CARBIDE INSERT 43689 4902;OD 3.750 IN.;0.625 IN. THICK;FOUR HOLES THRU 0.406 IN. DIA ON A 3.000 IN. BOLT CIRCLE;ID 0.501 IN. NOMINAL;COUNTERBORE TO 0.883 IN. NOMINAL AND 1.477 IN. NOMINAL;SLOT ON ONE EDGE 0.623 IN. DEEP AND 0.188 IN. RADIUS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4638328 ITEM 49 | 3/2 Design control — primary reference U.S. Government activity |
| 4638328 | D/9 Drawing number reference only U.S. Government activity |
| 2085-28 ITEM 49 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 2085-28 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-215-2268 is a Retaining Plate Assembly, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-215-8018. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-215-2268: General Characteristics Item Description: NICKEL COPPER ALLOY QQ-N-286 PLATE,43689 4901;TUNGSTEN CARBIDE INSERT 43689 4902;OD 3.750 IN.;0.625 IN. THICK;FOUR HOLES THRU 0.406 IN. DIA ON A 3.000 IN. BOLT CIRCLE;ID 0.501 IN. NOMINAL;COUNTERBORE TO 0.883 IN. NOMINAL AND 1.477 IN. NOMINAL;SLOT ON ONE EDGE 0.623 IN. DEEP AND 0.188 IN. RADIUS IN. 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.