NSN 4520-01-509-2955 · NIIN 015092955 · Part number 6391040-01 FIND 4
Naval Sea Systems Command · FSC 4520 — Space and Water Heating Equipment · FSG 45 — Plumbing, Heating, and Waste Disposal · CAGE 53711
Government record, cited
NSN 4520-01-509-2955 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-509-2955. Manufacturer of record part number: 6391040-01 FIND 4.
Also searched as4520-01-509-2955 ·
4520015092955 ·
NIIN 015092955 ·
01-509-2955 ·
FSC 4520 Space and Water Heating Equipment · CAGE 53711 · 6391040-01 FIND 4 · 2013K57
Cross-Sectional Diameter: 4.000 INCHES MINIMUM AND 6.000 INCHES MAXIMUM IN
2 manufacturer part numbers on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4520-01-509-2955
NIIN: 015092955
FSC: 4520 — Space and Water Heating Equipment
FSG: 45 — Plumbing, Heating, and Waste Disposal
Primary part number: 6391040-01 FIND 4
Manufacturer: Naval Sea Systems Command
General Description
The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-509-2955, 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 Naval Sea Systems Command. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
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 4520-01-509-2955?
NSN 4520-01-509-2955 is a Pipe,air Conditioning-Heating, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
What part numbers are listed for NSN 4520-01-509-2955?
NSN 4520-01-509-2955 has 2 manufacturer part numbers on file: 6391040-01 FIND 4 (Naval Sea Systems Command), 2013K57 (Mcmaster-Carr Supply Company).
What are the specifications of 6391040-01 FIND 4?
Key specifications for 6391040-01 FIND 4: Length: 7.000 INCHES NOMINAL IN; Shape: ROUND; Special Features: CXCY / PIPE INCREASER 4-6; End Item Identification: REDUCER, LCL. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4520-01-509-2955 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.