PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-F-14256Flux,soldering

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 3439-01-373-7966 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-01-373-7966 — this item is cataloged by the U.S. Government under National Stock Number 3439-01-373-7966. Primary manufacturer part number: MIL-F-14256.
Features
  • Flux,soldering — FSC 3439
  • Material for Which Formulated: SOLDER, SILVER
  • Physical Form: PASTE
  • 3 verified cross-references
  • Primary manufacturer: Federal Specifications Promulgated by General Services Administration Washington DC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Flux,soldering, cataloged under National Stock Number 3439-01-373-7966, is classified within Federal Supply Class 3439 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3439-01-373-7966
Primary Part NumberMIL-F-14256
Item NameFlux,soldering
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Material for Which FormulatedSOLDER, SILVER
Physical FormPASTE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3439-00-009-8808 INTERCHANGEABLE
Flux,soldering
3439-00-069-5815FORMULA 197 1QT INTERCHANGEABLE
Flux,soldering
Kester Inc
3439-00-162-8388 INTERCHANGEABLE
Flux,soldering
3439-00-220-3827 INTERCHANGEABLE
Flux,soldering
3439-00-400-1972 INTERCHANGEABLE
Flux,soldering
3439-00-752-87281544 SOLDER INTERCHANGEABLE
Flux,soldering
Kester Inc
3439-01-007-5494 INTERCHANGEABLE
Flux,soldering
3439-01-045-7940 INTERCHANGEABLE
Flux,soldering
3439-01-141-2161 INTERCHANGEABLE
Flux,soldering
Cross-Reference Index
Part NumberManufacturer
MIL-F-14256 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
ASTM B32 RMA PASTE American Society for Testing and Materials Dba Astm International (USA)
ASTM B32 American Society for Testing and Materials Dba Astm International (USA)
Related Parts
3439-00-009-8808INTERCHANGEABLE
FLUX,SOLDERING
3439-00-069-5815INTERCHANGEABLE
FLUX,SOLDERING
FORMULA 197 1QT
3439-00-162-8388INTERCHANGEABLE
FLUX,SOLDERING
3439-00-220-3827INTERCHANGEABLE
FLUX,SOLDERING
3439-00-400-1972INTERCHANGEABLE
FLUX,SOLDERING
3439-00-752-8728INTERCHANGEABLE
FLUX,SOLDERING
1544 SOLDER
3439-01-007-5494INTERCHANGEABLE
FLUX,SOLDERING
3439-01-045-7940INTERCHANGEABLE
FLUX,SOLDERING
3439-01-141-2161INTERCHANGEABLE
FLUX,SOLDERING

Frequently Asked Questions

What is NSN 3439-01-373-7966?

NSN 3439-01-373-7966 is a Flux,soldering, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 3439 (No Item Name Available). Status: active.

What are the part numbers for NSN 3439-01-373-7966?

NSN 3439-01-373-7966 has 3 cross-referenced part numbers: MIL-F-14256 (Federal Specifications Promulgated by General Services Administration Washington DC), ASTM B32 RMA PASTE (American Society for Testing and Materials Dba Astm International), ASTM B32 (American Society for Testing and Materials Dba Astm International).

What NSN replaces 3439-01-373-7966?

There are 9 known substitutes for 3439-01-373-7966: 3439-00-009-8808, 3439-00-069-5815, 3439-00-162-8388 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-F-14256?

Key specifications for MIL-F-14256: Material for Which Formulated: SOLDER, SILVER; Physical Form: PASTE; Special Features: MILDLY ACTIVATED ROSIN,8 OZ. OZ. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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