The Stem Assembly,valve, cataloged under National Stock Number 4820-01-144-4252, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-144-4252 |
| Item Name | Stem Assembly,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | C/OSTEM 1,BUSHING 1,NUT AND PLUG 1 |
| Criticality Code Justification | ZZZY |
| 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 |
| Reference | Meaning |
|---|---|
| 26M00-81RR01ASSYAFL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| SS845-2445483ASSYAFL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 26M00-81RR01ASSYAF | 5/1 Secondary reference U.S. Government activity |
| SS845-2445483ASSYAF | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-144-4252 is a Stem Assembly,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-331-1820. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-144-4252: General Characteristics Item Description: C/OSTEM 1,BUSHING 1,NUT AND PLUG 1; Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS. 3 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 4820-01-144-4252 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.