The Retainer,seat,valve, cataloged under National Stock Number 4820-01-442-1967, 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 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-442-1967 |
| Primary Part Number | 211041872 |
| Item Name | Retainer,seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Outside Diameter | 1.456 INCHES NOMINAL IN |
| Valve Size for Which Designed | 0.250 INCHES IN |
| Inside Diameter | 1.064 INCHES NOMINAL IN |
| Valve Design Control Activity | 53711 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 801-6405342 FIND 10 | Naval Sea Systems Command (USA) |
| 211041872 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405342 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-442-1967 is a Retainer,seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-442-1967 has 2 manufacturer part numbers on file: 801-6405342 FIND 10 (Naval Sea Systems Command), 211041872 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-448-8415, 4820-01-541-6203, 4820-01-634-0151. Verify interchangeability with system specifications before substitution.
Key specifications for 211041872: Outside Diameter: 1.456 INCHES NOMINAL IN; Overall Length: 0.230 INCHES NOMINAL IN; Valve Size for Which Designed: 0.250 INCHES IN; Inside Diameter: 1.064 INCHES NOMINAL 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.