NSN 3439-00-255-4573 · NIIN 002554573 · Part number 51F640
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · FSC 3439 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories · FSG 34 — Metalworking Machinery (continued) · CAGE 10001
Government record, cited
NSN 3439-00-255-4573 — this item is cataloged by the U.S. Government under National Stock Number 3439-00-255-4573. Manufacturer of record part number: 51F640.
Also searched as3439-00-255-4573 ·
3439002554573 ·
NIIN 002554573 ·
00-255-4573 ·
FSC 3439 Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories · CAGE 10001 · 51F640
Material for Which Formulated: ALL METALS,ALLOYS EXCEPT ALUMINUM BRONZE OR WITH SILVER SOLDER
Content Within Each Unit Package: 1 LB LBS
Physical Form: PASTE
1 manufacturer part number on file
Manufacturer of record: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Identification
NSN: 3439-00-255-4573
NIIN: 002554573
FSC: 3439 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories
FSG: 34 — Metalworking Machinery (continued)
Primary part number: 51F640
Manufacturer: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
General Description
The Flux,brazing, cataloged under National Stock Number 3439-00-255-4573, is classified within Federal Supply Class 3439 (Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories) of the Metalworking Machinery (continued) group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. 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.
Technical Specifications
Parameter
Value
NSN
3439-00-255-4573
Primary Part Number
51F640
Item Name
Flux,brazing
FSC / FSG
3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories
Manufacturer
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Status
ACTIVE
Material for Which Formulated
ALL METALS,ALLOYS EXCEPT ALUMINUM BRONZE OR WITH SILVER SOLDER
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
No interchangeability data on file.
Other items in FSC 3439 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3439-00-001-0002
3439-00-001-0002 · Item name not on file
3439-00-001-4196
3439-00-001-4196 · Item name not on file
3439-00-001-4197
3439-00-001-4197 · Item name not on file
3439-00-003-1195
3439-00-003-1195 · Item name not on file
3439-00-003-8601
SOLDER,LEAD ALLOY
3439-00-003-8602
SOLDER,LEAD-TIN ALLOY
3439-00-004-0913
HOUSING,ELECTRIC SO
3439-00-004-0915
SOLDERING GUN
Frequently Asked Questions
What is NSN 3439-00-255-4573?
NSN 3439-00-255-4573 is a Flux,brazing, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
What part numbers are listed for NSN 3439-00-255-4573?
NSN 3439-00-255-4573 has 1 manufacturer part number on file: 51F640 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
What are the specifications of 51F640?
Key specifications for 51F640: Material for Which Formulated: ALL METALS,ALLOYS EXCEPT ALUMINUM BRONZE OR WITH SILVER SOLDER; Content Within Each Unit Package: 1 LB LBS; Physical Form: PASTE. 3 specifications are documented in the U.S. Government catalog.
Is NSN 3439-00-255-4573 hazardous material?
Hazardous per DLA record (HMIC Y). 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.