The Seat,valve, cataloged under National Stock Number 4820-01-151-8959, 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 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-151-8959 |
| Primary Part Number | AA39968 PIECE 28 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.625 INCHES NOMINAL IN |
| Flange Diameter | 5.978 INCHES NOMINAL IN |
| Body Outside Diameter | 5.600 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 4.880 INCHES NOMINAL IN |
| Under Flange Height | 0.500 INCHES NOMINAL IN |
| Material | NICKEL ALLOY OVERALL |
| Seat Angle in Deg | 28.000 NOMINAL |
| 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 |
|---|---|
| AA39968 PIECE 28 PRIMARY | Hunt Valve Company, Inc. (USA) |
| D35894 | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| D35894MFE | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company Inc Dba Union Flonetics |
| AA39968 PIECE 28 | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
| D35894 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-01-151-8959 is a Seat,valve, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-151-8959 has 2 manufacturer part numbers on file: AA39968 PIECE 28 (Hunt Valve Company, Inc.), D35894 (Hunt Valve Company, Inc.).
Key specifications for AA39968 PIECE 28: Flange Seat to Disk End Height: 0.625 INCHES NOMINAL IN; Flange Diameter: 5.978 INCHES NOMINAL IN; Body Outside Diameter: 5.600 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 9 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.