The Stem,fluid Valve, cataloged under National Stock Number 4820-01-329-8423, 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 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-329-8423 |
| Primary Part Number | 845-4558766 ITEM 15AL1 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Largest Outside Diameter | 0.935 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | QQ-N-286,CL A FED SPEC SINGLE MATERIAL RESPONSE |
| Material | NICKEL ALLOY K-500 |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW 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 |
|---|---|
| 845-4558766 ITEM 15AL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 4558793 ITEM 7L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 4558793 ITEM 7 | 5/1 Secondary reference U.S. Government activity |
| 845-4558766 ITEM 15A | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-329-8423 is a Stem,fluid Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-329-8423 has 1 manufacturer part number on file: 845-4558766 ITEM 15AL1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 845-4558766 ITEM 15AL1: Largest Outside Diameter: 0.935 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY; Material Document and Classification: QQ-N-286,CL A FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 5.750 INCHES NOMINAL IN. 5 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 4820-01-329-8423 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.