The Seat,valve, cataloged under National Stock Number 4820-01-297-0264, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-297-0264 |
| Primary Part Number | 1S-473-5-4 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division |
| Status | ACTIVE |
| Style Designator | PLAIN THREADED |
| Body Inside Diameter | 27.750 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 |
|---|---|
| 1S-473-5-4 PRIMARY | Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division (USA) |
| Reference | Meaning |
|---|---|
| 1S-473-5D-4 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 15-473-5D-4 | 5/9 Secondary reference Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division |
| 1S-473-5D PIECE 4 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-297-0264 is a Seat,valve, manufactured by Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-297-0264 has 1 manufacturer part number on file: 1S-473-5-4 (Flowserve Us, Inc. Dba Automax Actuators Div Flow Control Division).
Key specifications for 1S-473-5-4: Overall Height: 1.500 INCHES NOMINAL IN; Style Designator: PLAIN THREADED; Body Inside Diameter: 27.750 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.