The Valve,hydraulic Check, cataloged under National Stock Number 4820-01-050-3480, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ausco Inc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-050-3480 |
| Primary Part Number | M4012-6 |
| Item Name | Valve,hydraulic Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ausco Inc |
| Status | ACTIVE |
| FSC Application Data | HYDRAULIC SYSTEM,ACFT |
| General Characteristics Item Description | 1.570 IN. OVERALL LENGTH; 0.371 IN. MIN 0.373 IN. MAX INSIDE DIA; MAX WT 0.040 LB LBS |
| 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 |
|---|---|
| M4012-6 | Ausco Inc (USA) |
| A2640 | Preece Inc Decca Valves Div (USA) |
| Reference | Meaning |
|---|---|
| 4820PL0566932 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4C3204 | 3/2 Design control — primary reference U.S. Government activity |
| C7907-4 | 7/2 Vendor item drawing reference U.S. Government activity |
| 4820PL0578578 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-050-3480 is a Valve,hydraulic Check, manufactured by Ausco Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-050-3480 has 2 manufacturer part numbers on file: M4012-6 (Ausco Inc), A2640 (Preece Inc Decca Valves Div).
Key specifications for M4012-6: FSC Application Data: HYDRAULIC SYSTEM,ACFT; General Characteristics Item Description: 1.570 IN. OVERALL LENGTH; 0.371 IN. MIN 0.373 IN. MAX INSIDE DIA; MAX WT 0.040 LB LBS; End Item Identification: ACFT,TYPE F-16; T.O. 1F-4-29-FIG 48,IND 21. 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.