PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

INDALLOY 5-R 1 PT BTFlux,soldering

Indium Corp of America · NSN 3439-00-220-3827 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-00-220-3827 — this item is cataloged by the U.S. Government under National Stock Number 3439-00-220-3827. Primary manufacturer part number: INDALLOY 5-R 1 PT BT.
Features
  • Flux,soldering — FSC 3439
  • Material for Which Formulated: TIN-SILVER
  • Nondefinitive Spec/std Data: R TYPE
  • Content Within Each Unit Package: 1 PT
  • Environmental Protection: CORROSION RESISTANT
  • Physical Form: LIQUID
  • 14 verified cross-references
  • Primary manufacturer: Indium Corp of America
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Flux,soldering, cataloged under National Stock Number 3439-00-220-3827, is classified within Federal Supply Class 3439 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Indium Corp of America. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 9 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
NSN3439-00-220-3827
Primary Part NumberINDALLOY 5-R 1 PT BT
Item NameFlux,soldering
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerIndium Corp of America
StatusACTIVE
Material for Which FormulatedTIN-SILVER
Nondefinitive Spec/std DataR TYPE
Content Within Each Unit Package1 PT
Environmental ProtectionCORROSION RESISTANT
Physical FormLIQUID
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
3439-00-400-1972 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
3439-01-373-7966 INTERCHANGEABLE
Flux,soldering
Cross-Reference Index
Part NumberManufacturer
INDALLOY 5-R 1 PT BT Indium Corp of America (USA)
ASTM B32 American Society for Testing and Materials Dba Astm International (USA)
ALPHA 100 FLUX 1 PT BT Alpha Metals Inc Div Alpha Assembly Solutions Inc (USA)
MIL-F-14256 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
DUTCHB0Y105 N L Industries Inc Metal Div (USA)
1035 1 PT BT Gardiner Metal Co (USA)
TYPE R 1 PT BT Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LONCO MIL-WW-35 1 PT BT Alpha Metals Inc (USA)
ALPHA 100 FLUX 1 PT BT Frys Metals Inc (USA)
LONCO MIL-W-01 1 PT BT Alpha Metals Inc (USA)
FORMULA 115 1 PT BT Kester Inc (USA)
ASTM B32 TYPE 4 American Society for Testing and Materials Dba Astm International (USA)
FORMULA 135 1 PT BT Kester Inc (USA)
1135 1 PT BT Gardiner Metal Co (USA)
Related Parts
3439-00-009-8808INTERCHANGEABLE
FLUX,SOLDERING
3439-00-069-5815INTERCHANGEABLE
FLUX,SOLDERING
FORMULA 197 1QT
3439-00-162-8388INTERCHANGEABLE
FLUX,SOLDERING
3439-00-400-1972INTERCHANGEABLE
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
3439-01-373-7966INTERCHANGEABLE
FLUX,SOLDERING

Frequently Asked Questions

What is NSN 3439-00-220-3827?

NSN 3439-00-220-3827 is a Flux,soldering, manufactured by Indium Corp of America, classified under FSC 3439 (No Item Name Available). Status: active.

What are the part numbers for NSN 3439-00-220-3827?

NSN 3439-00-220-3827 has 14 cross-referenced part numbers: INDALLOY 5-R 1 PT BT (Indium Corp of America), ASTM B32 (American Society for Testing and Materials Dba Astm International), ALPHA 100 FLUX 1 PT BT (Alpha Metals Inc Div Alpha Assembly Solutions Inc), MIL-F-14256 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), DUTCHB0Y105 (N L Industries Inc Metal Div) and 9 more.

What NSN replaces 3439-00-220-3827?

There are 9 known substitutes for 3439-00-220-3827: 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 INDALLOY 5-R 1 PT BT?

Key specifications for INDALLOY 5-R 1 PT BT: Material for Which Formulated: TIN-SILVER; Nondefinitive Spec/std Data: R TYPE; Content Within Each Unit Package: 1 PT; Environmental Protection: CORROSION RESISTANT. 5 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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