The Stem,needle Valve, cataloged under National Stock Number 4820-01-520-3535, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-520-3535 |
| Item Name | Stem,needle Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Valve Size for Which Designed | 1.250 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 803-2177525-M61X-35 | 5/9 Secondary reference Naval Sea Systems Command |
| 803-2177525-M6XX-35 | 3/2 Design control — primary reference U.S. Government activity |
| 803-2177525-M61X-35 | 5/9 Secondary reference U.S. Government activity |
| 2177525 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-520-3535 is a Stem,needle Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-520-3535: Valve Size for Which Designed: 1.250 INCHES IN; Special Features: PART TO BE USED ON A SURFACE SHIP SO NO SPECIAL CERTIFICATION REQUIRED; PART NAME ASSIGNED BY THE CONTROLLING AGENCY IS, STEM DISC ASSEMBLY (STOP VALVES).; End Item Identification: VALVE, GLOBE 900 PSI SWLDG. 1 specification is 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.