The Seat,valve, cataloged under National Stock Number 4820-01-397-5724, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is W & O Supply Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-397-5724 |
| Primary Part Number | 991-407-014-004 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | W & O Supply Inc |
| Status | ACTIVE |
| Material | RUBBER SYNTHETIC SEAT |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 991-407-014-004 | Atlas Incinerators A/s (DNK) |
| 991-407-014-004 PRIMARY | W & O Supply Inc (USA) |
| Reference | Meaning |
|---|---|
| 991-407-014-004 | 5/9 Secondary reference Young & Cunningham America, Inc. |
| 000 991 407 ITEM 4 2-INCH | 5/9 Secondary reference Waukesha Bearings Corporation |
| 991-407-014-004 | 5/9 Secondary reference Waukesha Bearings Corporation |
| 000 991 407 | D/9 Drawing number reference only Waukesha Bearings Corporation |
NSN 4820-01-397-5724 is a Seat,valve, manufactured by W & O Supply Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-397-5724 has 2 manufacturer part numbers on file: 991-407-014-004 (Atlas Incinerators A/s), 991-407-014-004 (W & O Supply Inc).
Key specifications for 991-407-014-004: Special Features: USED ON A WAUKESHA BEARINGS 2 INCH VENT CHECK VALVE IN; Material: RUBBER SYNTHETIC SEAT; Seating Surface Shape: ANGULAR. 2 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.