The Retainer,gasket,valve Disk, cataloged under National Stock Number 4820-01-131-7760, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-131-7760 |
| Primary Part Number | 209-1414511 PIECE 6 |
| Item Name | Retainer,gasket,valve Disk |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL-COPPER ALLOY,QQ-N-288,COMP G |
| 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 |
|---|---|
| 79-D-146PC6 | Derbyshire Machine & Tool Co (USA) |
| 209-1414511 PIECE 6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| SS-209-1414511 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 209-1414511 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-131-7760 is a Retainer,gasket,valve Disk, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-131-7760 has 2 manufacturer part numbers on file: 79-D-146PC6 (Derbyshire Machine & Tool Co), 209-1414511 PIECE 6 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-133-5905, 4820-01-296-9356. Verify interchangeability with system specifications before substitution.
Key specifications for 209-1414511 PIECE 6: General Characteristics Item Description: NICKEL-COPPER ALLOY,QQ-N-288,COMP G. 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.