The Heater,immersion, cataloged under National Stock Number 4520-01-377-5418, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-377-5418 |
| Primary Part Number | 8398082 |
| Item Name | Heater,immersion |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| 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 |
NSN 4520-01-377-5418 is a Heater,immersion, manufactured by Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-377-5418 has 2 manufacturer part numbers on file: 8398082 (Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc), 8398082 (Engine Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-626-2902. Verify interchangeability with system specifications before substitution.
Key specifications for 8398082: End Item Identification: FOR GENERAL MOTORS DIESEL ENGINE MDL 20-645-E-4, SERIAL NUMBER 76-K1-1066. 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.