The Bonnet,fluid Cooler,industrial, cataloged under National Stock Number 4420-01-395-4630, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-395-4630 |
| Primary Part Number | 6401175 ITEM 3SS |
| Item Name | Bonnet,fluid Cooler,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR SUBSAFE ITEMS |
| 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 |
|---|---|
| 6401175 ITEM 3SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 595-6401175 ITEM 3SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 595-6401186 ITEM 1SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 211046334SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 6401186 ITEM1SS | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 595-6401175 ITEM3 | 5/1 Secondary reference Naval Sea Systems Command |
| 211046334 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4420-01-395-4630 is a Bonnet,fluid Cooler,industrial, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-395-4630 has 5 manufacturer part numbers on file: 6401175 ITEM 3SS (Naval Inventory Control Point Mechanicsburg), 595-6401175 ITEM 3SS (Naval Inventory Control Point Mechanicsburg), 595-6401186 ITEM 1SS (Naval Inventory Control Point Mechanicsburg), 211046334SS (Naval Inventory Control Point Mechanicsburg), 6401186 ITEM1SS (Naval Inventory Control Point Mechanicsburg).
Key specifications for 6401175 ITEM 3SS: Criticality Code Justification: ZZZY; End Item Identification: MECH, DETENT; Reference Number Differentiating Characteristics: QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR SUBSAFE ITEMS. 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.