The Manifold,hydraulic System Access, cataloged under National Stock Number 4730-01-554-3493, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Appleton Marine Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-554-3493 |
| Primary Part Number | AMD-1740 ITEM 17 / NMD-389 |
| Item Name | Manifold,hydraulic System Access |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Appleton Marine Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| AMD-1740 ITEM 17 / NMD-389 PRIMARY | Appleton Marine Inc (USA) |
| CY4546 | Hsi Corporation (USA) |
| Reference | Meaning |
|---|---|
| AMD-1740 | D/9 Drawing number reference only Appleton Marine Inc |
NSN 4730-01-554-3493 is a Manifold,hydraulic System Access, manufactured by Appleton Marine Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-554-3493 has 2 manufacturer part numbers on file: AMD-1740 ITEM 17 / NMD-389 (Appleton Marine Inc), CY4546 (Hsi Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 3110-01-555-1320, 5340-01-555-1321. Verify interchangeability with system specifications before substitution.
Key specifications for AMD-1740 ITEM 17 / NMD-389: Part Name Assigned by Controlling Agency: CYLINDER SEQUENCE MANIFOLD FOR NMD-389; End Item Identification: NEW CONSTRUCTION LPD21. 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.