The Stem,fluid Valve, cataloged under National Stock Number 4820-01-331-1818, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-331-1818 |
| Primary Part Number | 26M00-81RR01 ASSY AZL1 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 26M00-81RR01 ASSY AZL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| SS845-2445483 ASSY AZL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| SS845-2050958 PIECE 9 MODL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| SS845-2445483 ASSY AZ | 3/1 Design control — primary reference U.S. Government activity |
| 26M00-81RR01 ASSY AZ | 5/1 Secondary reference U.S. Government activity |
| SS845-2050958 PIECE 9 MOD | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-331-1818 is a Stem,fluid Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-331-1818 has 3 manufacturer part numbers on file: 26M00-81RR01 ASSY AZL1 (Naval Inventory Control Point Mechanicsburg), SS845-2445483 ASSY AZL1 (Naval Inventory Control Point Mechanicsburg), SS845-2050958 PIECE 9 MODL1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 26M00-81RR01 ASSY AZL1: Criticality Code Justification: ZZZY; End Item Identification: BALL VALVE; Reference Number Differentiating Characteristics: QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS. 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.
NSN 4820-01-331-1818 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.