The Seat,valve, cataloged under National Stock Number 4820-01-178-3054, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-178-3054 |
| Primary Part Number | A48490MRF |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Body Outside Diameter | 1.750 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.812 INCHES NOMINAL IN |
| Material | RUBBER 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 |
|---|---|
| D49222 ITEM 7C | Hunt Valve Company, Inc. (USA) |
| A48490MRF PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A48490MRF | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
| D49222 ITEM 7C | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| D49222 | D/9 Drawing number reference only Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-178-3054 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-178-3054 has 2 manufacturer part numbers on file: D49222 ITEM 7C (Hunt Valve Company, Inc.), A48490MRF (Hunt Valve Company, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-180-0960. Verify interchangeability with system specifications before substitution.
Key specifications for A48490MRF: Overall Height: 0.062 INCHES NOMINAL IN; Body Outside Diameter: 1.750 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 0.812 INCHES NOMINAL IN. 5 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.