The Heat Exchanger 4th, cataloged under National Stock Number 4420-01-571-0327, 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 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4420-01-571-0327 |
| Primary Part Number | 71-7727 OXYGEN CLEAN CP |
| Item Name | Heat Exchanger 4th |
| 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 | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| 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 |
|---|---|
| 71-7727 OXYGEN CLEAN CP | Naval Inventory Control Point Mechanicsburg (USA) |
| D3358 ITEM 26 OXYGEN CLEAN CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 71-7727 OXYGEN CLEAN | 3/1 Design control — primary reference Rix Industries |
| D3358 ITEM 26 OXYGEN CLEAN | 5/1 Secondary reference Rix Industries |
NSN 4420-01-571-0327 is a Heat Exchanger 4th, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-571-0327 has 2 manufacturer part numbers on file: 71-7727 OXYGEN CLEAN CP (Naval Inventory Control Point Mechanicsburg), D3358 ITEM 26 OXYGEN CLEAN CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 71-7727 OXYGEN CLEAN CP: Criticality Code Justification: ZZZY; Special Features: COMPRESSOR NI. INAVY IS HEAT EXCHANGER 4TH STAGE; Part Name Assigned by Controlling Agency: HX, 4TH STAGE; End Item Identification: COMPRESSOR NITROGEN. 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.