The Seat,valve, cataloged under National Stock Number 4820-01-152-0166, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company Inc Dba Union Flonetics. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-152-0166 |
| Primary Part Number | A49343MFD |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company Inc Dba Union Flonetics |
| Status | ACTIVE |
| Flange Diameter | 5.650 INCHES NOMINAL IN |
| Body Inside Diameter | 4.000 INCHES NOMINAL IN |
| Material | NICKEL ALLOY OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| A49343MFD PRIMARY | Hunt Valve Company Inc Dba Union Flonetics (USA) |
| D49440 ITEM 4 PRIMARY | Hunt Valve Company Inc Dba Union Flonetics (USA) |
| Reference | Meaning |
|---|---|
| D49440 | D/9 Drawing number reference only Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-152-0166 is a Seat,valve, manufactured by Hunt Valve Company Inc Dba Union Flonetics, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-152-0166 has 2 manufacturer part numbers on file: A49343MFD (Hunt Valve Company Inc Dba Union Flonetics), D49440 ITEM 4 (Hunt Valve Company Inc Dba Union Flonetics).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-152-0255. Verify interchangeability with system specifications before substitution.
Key specifications for A49343MFD: Flange Diameter: 5.650 INCHES NOMINAL IN; Overall Height: 1.422 INCHES NOMINAL IN; Body Inside Diameter: 4.000 INCHES NOMINAL IN; Material: NICKEL ALLOY OVERALL. 4 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.