The Valve,hydraulic, cataloged under National Stock Number 4820-01-045-0940, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Preece Inc Decca Valves Div. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-045-0940 |
| Primary Part Number | A2540 |
| Item Name | Valve,hydraulic |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Preece Inc Decca Valves Div |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A2540 | Preece Inc Decca Valves Div (USA) |
| M9142DCD001 | National Machine Company Dba Nmg Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 4820PL0578488 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4820PL0578481 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C7906-4 | 7/2 Vendor item drawing reference U.S. Government activity |
| 4C3104 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-045-0940 is a Valve,hydraulic, manufactured by Preece Inc Decca Valves Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-045-0940 has 2 manufacturer part numbers on file: A2540 (Preece Inc Decca Valves Div), M9142DCD001 (National Machine Company Dba Nmg Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-189-3657. Verify interchangeability with system specifications before substitution.
Key specifications for A2540: End Item Identification: F-16. 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.
NSN 4820-01-045-0940 has DEMIL Code Q. 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.