The Valve,linear,directional Control, cataloged under National Stock Number 4820-01-121-0531, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-01-121-0531 |
| Primary Part Number | 20408-002 |
| Item Name | Valve,linear,directional Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 20408-002 PRIMARY | Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA) |
NSN 4820-01-121-0531 is a Valve,linear,directional Control, manufactured by Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-0531 has 1 manufacturer part number on file: 20408-002 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-130-3674. Verify interchangeability with system specifications before substitution.
Key specifications for 20408-002: Special Features: BODY HOUSING ALUMINUM ALLOY QQ-A-225/8,ALLOY 6061,T651;SLIDE/SLEEVE MATCHED SET NITRIDING STEEL MIL-S-6709;INTERNAL PARTS CONSISTS OF CORROSION RESISTANT STEEL,ALUMINUM,BUNA-N AND POLYTETRAFLUOROETHYLENE;VALVE ASSEMBLY DESIGNED TO MEET FOLLOWING PARAMETERS,FLOW 9-26 GPM,100 PSID W/FLUID,110.0 DEG PLUS OR MINUS 5 DEG FAHRENHEIT,RETURN PRESSURE 300.0 PLUS OR MINUS 5 PSIG;OPERATING PRESSURES 3000.0 PSIG. 0 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.