The Core Assembly,fluid Heater,indus, cataloged under National Stock Number 4420-01-377-6682, 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 Rix Industries. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-377-6682 |
| Primary Part Number | 71-133 |
| Item Name | Core Assembly,fluid Heater,indus |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Rix Industries |
| 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 |
|---|---|
| 71-133 PRIMARY | Rix Industries (USA) |
| Reference | Meaning |
|---|---|
| D2359 | D/9 Drawing number reference only Rix Industries |
NSN 4420-01-377-6682 is a Core Assembly,fluid Heater,indus, manufactured by Rix Industries, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-377-6682 has 1 manufacturer part number on file: 71-133 (Rix Industries).
1 possible match (shared part number, not a government interchangeability claim): 7510-01-381-1070. Verify interchangeability with system specifications before substitution.
Key specifications for 71-133: Special Features: PRESSURE RATING 2200 PSIG; HEAT EXCHANGER,3RD STAGE. 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.