The Retainer,spring, cataloged under National Stock Number 4820-01-209-3395, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-209-3395 |
| Primary Part Number | 516-2146439 PIECE 25 |
| Item Name | Retainer,spring |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | CRES QQ-S-766; 0.562 IN. THK; OVAL-SHAPED; CENTER HOLE 0.391 IN. DIA; 2 HOLES 0.193 IN. DIA,CENTER TO CENTER 1.000 IN. IN |
| 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 |
|---|---|
| 516-2146439 PIECE 25 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 76791-25X1 | D/9 Drawing number reference only U.S. Government activity |
| 516-2146439 | D/9 Drawing number reference only Naval Sea Systems Command |
| 76791-25X1 PIECE 25 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-209-3395 is a Retainer,spring, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-209-3395 has 1 manufacturer part number on file: 516-2146439 PIECE 25 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-209-4612, 4820-01-209-9248, 4820-01-210-2765. Verify interchangeability with system specifications before substitution.
Key specifications for 516-2146439 PIECE 25: General Characteristics Item Description: CRES QQ-S-766; 0.562 IN. THK; OVAL-SHAPED; CENTER HOLE 0.391 IN. DIA; 2 HOLES 0.193 IN. DIA,CENTER TO CENTER 1.000 IN. 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.