The Stem Assembly,valve, cataloged under National Stock Number 4820-01-320-2939, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-320-2939 |
| Item Name | Stem Assembly,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 529P323 | C/1 Advisory reference — outside the item-of-supply concept Grimes Aerospace Co |
| 970P193 PC 5 | 5/9 Secondary reference Grimes Aerospace Co |
| 970P193 PC 5 | 5/9 Secondary reference U.S. Government activity |
| 970P293CP | 5/9 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 970P193 PC 5 | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| 528P323 | 5/9 Secondary reference Grimes Aerospace Co |
| 970P193 PC 5CP | 5/9 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 528P323 | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| 528P323CP | 5/9 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 970P293 | 3/1 Design control — primary reference U.S. Government activity |
| 529P323 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-320-2939 is a Stem Assembly,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-320-2939: Criticality Code Justification: ZZZY; End Item Identification: PUMP UNIT,WATER,RECIPROCATING; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330. 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.