The Stem,fluid Valve, cataloged under National Stock Number 4820-01-101-6291, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-101-6291 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Type for Which Designed | BALL |
| Stem Actuating End Type | SQUARE |
| Criticality Code Justification | ZZZY |
| Valve Size for Which Designed | 1.500 INCHES IN |
| Material | NICKEL ALLOY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 845-4558788 ITEM 7L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2642-806-06 ITEM 3AL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2642-806-06 ITEM 3A | 3/1 Design control — primary reference U.S. Government activity |
| 845-4558767-003A | 5/1 Secondary reference U.S. Government activity |
| 845-4558788 ITEM 7 | 5/1 Secondary reference Naval Sea Systems Command |
| 845-4558767-003AL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4820-01-101-6291 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-321-7416. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-101-6291: Valve Type for Which Designed: BALL; Stem Actuating End Type: SQUARE; Criticality Code Justification: ZZZY; Valve Size for Which Designed: 1.500 INCHES IN. 6 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.
NSN 4820-01-101-6291 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.