The Disk,valve, cataloged under National Stock Number 4820-01-339-0573, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Setra Systems, Inc. Dba Gems Sensors. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Setra Systems, Inc. Dba Gems Sensors (CAGE 04034) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-339-0573 |
| Primary Part Number | 133703 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Setra Systems, Inc. Dba Gems Sensors |
| 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 |
|---|---|
| 133703 PRIMARY | Setra Systems, Inc. Dba Gems Sensors (USA) |
| FS-35576-5 PRIMARY | Setra Systems, Inc. Dba Gems Sensors (USA) |
| Reference | Meaning |
|---|---|
| FS-35576 | D/9 Drawing number reference only Setra Systems, Inc. Dba Gems Sensors |
| 24970 | C/1 Advisory reference — outside the item-of-supply concept Setra Systems, Inc. Dba Gems Sensors |
| 133704 | C/1 Advisory reference — outside the item-of-supply concept Setra Systems, Inc. Dba Gems Sensors |
NSN 4820-01-339-0573 is a Disk,valve, manufactured by Setra Systems, Inc. Dba Gems Sensors, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-339-0573 has 2 manufacturer part numbers on file: 133703 (Setra Systems, Inc. Dba Gems Sensors), FS-35576-5 (Setra Systems, Inc. Dba Gems Sensors).
5 possible matches (shared part number, not a government interchangeability claim): 5330-01-408-6417, 7690-01-474-9632, 3010-01-545-0815. Verify interchangeability with system specifications before substitution.
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.