NSN 4520-01-221-8959 · NIIN 012218959 · Part number DEN 40D
Smith a O Water Products Co Div of a O Smith Corp · FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal · CAGE 28611
Government record, cited
NSN 4520-01-221-8959 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-221-8959. Manufacturer of record part number: DEN 40D.
Also searched as4520-01-221-8959 ·
4520012218959 ·
NIIN 012218959 ·
01-221-8959 ·
FSC 4520 Space and Water Heating Equipment · CAGE 28611 · DEN 40D
Manufacturer of record: Smith a O Water Products Co Div of a O Smith Corp
Identification
NSN: 4520-01-221-8959
NIIN: 012218959
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
Primary part number: DEN 40D
Manufacturer: Smith a O Water Products Co Div of a O Smith Corp
General Description
The Heater,water,electric, cataloged under National Stock Number 4520-01-221-8959, 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 Smith a O Water Products Co Div of a O Smith Corp. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Smith a O Water Products Co Div of a O Smith Corp (USA)
No interchangeability data on file.
Other items in FSC 4520 — Space and Water Heating Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4520-00-000-0098
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-000-0099
4520-00-000-0099 · Item name not on file
4520-00-001-1240
4520-00-001-1240 · Item name not on file
4520-00-001-3518
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-3519
HEATING ELEMENT,ELECTRICAL,IMMER
4520-00-001-6052
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-6298
HEATING ELEMENT,ELECTRICAL,NONIM
4520-00-001-7726
HEATER,DUCT TYPE,PORTABLE
Frequently Asked Questions
What is NSN 4520-01-221-8959?
NSN 4520-01-221-8959 is a Heater,water,electric, manufactured by Smith a O Water Products Co Div of a O Smith Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What part numbers are listed for NSN 4520-01-221-8959?
NSN 4520-01-221-8959 has 1 manufacturer part number on file: DEN 40D (Smith a O Water Products Co Div of a O Smith Corp).
What are the specifications of DEN 40D?
Key specifications for DEN 40D: Phase: THREE; Heating Element Wattage Rating: 6000.000 SINGLE; Voltage in Volts and Current Type: 230.0 AC. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-221-8959 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.