The Stem,needle Valve, cataloged under National Stock Number 4820-01-026-8204, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-026-8204 |
| Primary Part Number | 20522-1 OLD |
| Item Name | Stem,needle Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Largest Outside Diameter | 0.312 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 20522-1 OLD | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 20522-1 OLD | 5/9 Secondary reference Dresser, Inc. Dba Pressure Regulation Group Div Dresser Pressure Regulation Group |
| N789 PIECE 21 | 5/9 Secondary reference Dresser, Inc. Dba Pressure Regulation Group Div Dresser Pressure Regulation Group |
| 20522-1 | 3/9 Design control — primary reference Dresser, Inc. Dba Pressure Regulation Group Div Dresser Pressure Regulation Group |
NSN 4820-01-026-8204 is a Stem,needle Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-026-8204 has 1 manufacturer part number on file: 20522-1 OLD (Naval Inventory Control Point Mechanicsburg).
4 possible matches (shared part number, not a government interchangeability claim): 5330-01-193-0295, 4820-01-398-9839, 5365-01-592-1289. Verify interchangeability with system specifications before substitution.
Key specifications for 20522-1 OLD: Largest Outside Diameter: 0.312 INCHES NOMINAL IN; Overall Length: 1.436 INCHES MINIMUM AND 1.446 INCHES MAXIMUM IN; End Item Identification: VALVE RED 1.50IPS 6000PSI 5T300PSI FPT CRES; Material: STEEL CORROSION RESISTING. 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.
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.