The Valve,check, cataloged under National Stock Number 4820-01-679-1681, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Viking Pump, Inc. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-679-1681 |
| Primary Part Number | 2-790-011-376-00 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Viking Pump, Inc |
| Status | ACTIVE |
| Valve Size | 0.250 INCHES IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 2-790-011-376-00 PRIMARY | Viking Pump, Inc (USA) |
| Reference | Meaning |
|---|---|
| 5-1915-2945-509-BOM L/NO 30.00 | 5/9 Secondary reference Viking Pump, Inc |
| 2-790-011-25J | 5/9 Secondary reference Viking Pump, Inc |
NSN 4820-01-679-1681 is a Valve,check, manufactured by Viking Pump, Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-679-1681 has 1 manufacturer part number on file: 2-790-011-376-00 (Viking Pump, Inc).
1 possible match (shared part number, not a government interchangeability claim): 3110-01-680-0532. Verify interchangeability with system specifications before substitution.
Key specifications for 2-790-011-376-00: Valve Size: 0.250 INCHES IN; Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE; Part Name Assigned by Controlling Agency: 1/4" NPT CHECK VALVE; Thread Series Designator: NPT ALL ENDS. 3 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.