NSN 4520-01-253-2249 · NIIN 012532249 · Part number 155-073168-001
Chromalox Inc Dba Chromalox Precision Heat and Control, Inc · FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal · CAGE 65586
Government record, cited
NSN 4520-01-253-2249 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-253-2249. Manufacturer of record part number: 155-073168-001.
Also searched as4520-01-253-2249 ·
4520012532249 ·
NIIN 012532249 ·
01-253-2249 ·
FSC 4520 Space and Water Heating Equipment · CAGE 65586 · 155-073168-001 · 155-073168-001VM · 155-073168-000
Nearby stock numbers← 4520-01-253-1427 Tank, Hot Water Storage
·
4520-01-253-3562 Heater, Circulation →
Features
Heater,immersion,liquid Fuel Fir — FSC 4520
2 manufacturer part numbers on file
Manufacturer of record: Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
Identification
NSN: 4520-01-253-2249
NIIN: 012532249
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
Primary part number: 155-073168-001
Manufacturer: Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
General Description
The Heater,immersion,liquid Fuel Fir, cataloged under National Stock Number 4520-01-253-2249, 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 Chromalox Inc Dba Chromalox Precision Heat and Control, Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4520-01-253-2249
Primary Part Number
155-073168-001
Item Name
Heater,immersion,liquid Fuel Fir
FSC / FSG
4520 / 45 — Space and Water Heating Equipment
Manufacturer
Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4520-01-257-9763155-073168-002POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,IMMER
Possible match (shared part number)Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
4520-01-257-9764319-225736-301POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,IMMER
Possible match (shared part number)Chromalox Inc
5330-01-280-6807071176-013POSSIBLE MATCH
GASKET
Possible match (shared part number)Chromalox Inc
4520-01-290-9145155-073168-003POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,IMMER
Possible match (shared part number)Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA)
Reference documents
Reference
Meaning
155-073168-000
D/9Drawing number reference only
Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
Related Parts
4520-01-257-9763POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,IMMER
155-073168-002
4520-01-257-9764POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,IMMER
319-225736-301
5330-01-280-6807POSSIBLE MATCH
GASKET
071176-013
4520-01-290-9145POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,IMMER
155-073168-003
Frequently Asked Questions
What is NSN 4520-01-253-2249?
NSN 4520-01-253-2249 is a Heater,immersion,liquid Fuel Fir, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What part numbers are listed for NSN 4520-01-253-2249?
NSN 4520-01-253-2249 has 2 manufacturer part numbers on file: 155-073168-001VM (Naval Inventory Control Point Mechanicsburg), 155-073168-001 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc).
What NSN replaces 4520-01-253-2249?
4 possible matches (shared part number, not a government interchangeability claim): 4520-01-257-9763, 4520-01-257-9764, 5330-01-280-6807. Verify interchangeability with system specifications before substitution.
What are the specifications of 155-073168-001?
Key specifications for 155-073168-001: Special Features: MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-253-2249 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.