The Indicator,valve Opening, cataloged under National Stock Number 4820-01-322-6658, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-322-6658 |
| Primary Part Number | 185000053A01 |
| Item Name | Indicator,valve Opening |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am |
| 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 |
|---|---|
| 185000053A01 | Isotta Fraschini Motori Spa (ITA) |
| 185000053A01 PRIMARY | Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am (USA) |
| Reference | Meaning |
|---|---|
| 185000053A01 | C/1 Advisory reference — outside the item-of-supply concept L a S Mfg Co |
| 185000053A01 | 5/9 Secondary reference Grandi Motori Fincantieri /fggm/ Div |
| 185000053A01 | 5/9 Secondary reference Isotta Fraschini Motori S P a |
| 2400-3459SH43 | D/9 Drawing number reference only Naval Station |
NSN 4820-01-322-6658 is a Indicator,valve Opening, manufactured by Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-322-6658 has 2 manufacturer part numbers on file: 185000053A01 (Isotta Fraschini Motori Spa), 185000053A01 (Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am).
Key specifications for 185000053A01: End Item Identification: DIESEL ENGINE; FINCANTIERI,MODEL 2894F01. 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.