The Heating Element,electrical,immer, cataloged under National Stock Number 2590-01-701-3946, is classified within Federal Supply Class 2590 (Miscellaneous Vehicular Components) of the Vehicular Equipment Components group. The manufacturer of record is Watlow Electric Manufacturing Co Dba Watlow. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 2590 — Miscellaneous Vehicular Components (FSG 25) |
| Manufacturers | Watlow Electric Manufacturing Co Dba Watlow (CAGE 79221); Lake Shore Systems, Inc. (CAGE 34712) |
| Parameter | Value |
|---|---|
| NSN | 2590-01-701-3946 |
| Primary Part Number | BHSS25A5C4 |
| Item Name | Heating Element,electrical,immer |
| FSC / FSG | 2590 / 25 — Miscellaneous Vehicular Components |
| Manufacturer | Watlow Electric Manufacturing Co Dba Watlow |
| 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 |
|---|---|
| BHSS25A5C4 PRIMARY | Watlow Electric Manufacturing Co Dba Watlow (USA) |
| P010649 REV E ITEM 10 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| P010649 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 2590-01-701-3946 is a Heating Element,electrical,immer, manufactured by Watlow Electric Manufacturing Co Dba Watlow, classified under FSC 2590, Miscellaneous Vehicular Components. Status: active.
NSN 2590-01-701-3946 has 2 manufacturer part numbers on file: BHSS25A5C4 (Watlow Electric Manufacturing Co Dba Watlow), P010649 REV E ITEM 10 (Lake Shore Systems, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-701-8461, 6680-01-702-1098, 6685-01-702-2522. Verify interchangeability with system specifications before substitution.
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.