The Disk,valve, cataloged under National Stock Number 4820-01-033-6817, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-033-6817 |
| Primary Part Number | 039543 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| 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 |
|---|---|
| 039543 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 039533 | L3 Technologies, Inc. Div L3 Keo (USA) |
| Reference | Meaning |
|---|---|
| 908B039543 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 908B039543 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
| 908C039533 ITEM 7 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 4820-01-033-6817 is a Disk,valve, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-033-6817 has 2 manufacturer part numbers on file: 039543 (L3 Technologies, Inc. Div L3 Keo), 039533 (L3 Technologies, Inc. Div L3 Keo).
1 possible match (shared part number, not a government interchangeability claim): 5961-01-085-8911. Verify interchangeability with system specifications before substitution.
Key specifications for 039543: Part Name Assigned by Controlling Agency: DISK,POLYTETRAFLUOROETHYLENE. 0 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.