PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

QQS571BTYPESN50Solder,lead-Tin Alloy

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 3439-00-086-0203 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-00-086-0203 — this item is cataloged by the U.S. Government under National Stock Number 3439-00-086-0203. Primary manufacturer part number: QQS571BTYPESN50.
Features
  • Solder,lead-Tin Alloy — FSC 3439
  • Chemical Composition Percentage: LEAD 50.0; TIN 50.0
  • Wire Core Type: SOLID
  • Departure From Cited Designator: AS MODIFIED BY DIAMETER AND WIRE CORE TYPE
  • Diameter: 0.062 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: SN50 TYPE
  • Content Within Each Unit Package: 1 LB LBS
  • 2 verified cross-references
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Solder,lead-Tin Alloy, cataloged under National Stock Number 3439-00-086-0203, 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 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3439-00-086-0203
Primary Part NumberQQS571BTYPESN50
Item NameSolder,lead-Tin Alloy
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Chemical Composition PercentageLEAD 50.0; TIN 50.0
Wire Core TypeSOLID
Departure From Cited DesignatorAS MODIFIED BY DIAMETER AND WIRE CORE TYPE
Diameter0.062 INCHES NOMINAL IN
Nondefinitive Spec/std DataSN50 TYPE
Content Within Each Unit Package1 LB LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3439-00-198-3429SN63WS INTERCHANGEABLE
Solder,tin Alloy
American Society for Testing and Materials Dba Astm International
3439-00-273-2536SN60WRP2 0.125 1LB INTERCHANGEABLE
Solder,tin Alloy
American Society for Testing and Materials Dba Astm International
3439-01-008-7577SN63WRMAP3 0.028 1LB INTERCHANGEABLE
Solder,tin Alloy
American Society for Testing and Materials Dba Astm International
3439-01-031-7044SN63PB37SB0.4-W-0.050-ROM1 INTERCHANGEABLE
Solder,tin Alloy
Ipc International Inc Dba Global Electronics Association
3439-01-036-5762SN60WRAP2 0.125 1LB INTERCHANGEABLE
Solder,tin Alloy
American Society for Testing and Materials Dba Astm International
3439-01-039-0064SN60WRAP3 0.020 1LB INTERCHANGEABLE
Solder,tin Alloy
American Society for Testing and Materials Dba Astm International
3439-01-104-6430SN60WRMAP2 0.063 INTERCHANGEABLE
Solder,tin Alloy
American Society for Testing and Materials Dba Astm International
3439-01-158-0731SN60PB40-WRAP2-0--025 1LB INTERCHANGEABLE
Solder,tin Alloy
Ipc International Inc Dba Global Electronics Association
3439-01-398-3036SN63PB37WRMAP3 INTERCHANGEABLE
Solder,tin Alloy
Ipc International Inc Dba Global Electronics Association
3439-01-471-7038 INTERCHANGEABLE
Solder,tin Alloy
Cross-Reference Index
Part NumberManufacturer
QQS571BTYPESN50 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
IPC J-STD-006 Ipc International Inc Dba Global Electronics Association (USA)
Related Parts
3439-00-198-3429INTERCHANGEABLE
SOLDER,TIN ALLOY
SN63WS
3439-00-273-2536INTERCHANGEABLE
SOLDER,TIN ALLOY
SN60WRP2 0.125 1LB
3439-01-008-7577INTERCHANGEABLE
SOLDER,TIN ALLOY
SN63WRMAP3 0.028 1LB
3439-01-031-7044INTERCHANGEABLE
SOLDER,TIN ALLOY
SN63PB37SB0.4-W-0.050-ROM1
3439-01-036-5762INTERCHANGEABLE
SOLDER,TIN ALLOY
SN60WRAP2 0.125 1LB
3439-01-039-0064INTERCHANGEABLE
SOLDER,TIN ALLOY
SN60WRAP3 0.020 1LB
3439-01-104-6430INTERCHANGEABLE
SOLDER,TIN ALLOY
SN60WRMAP2 0.063
3439-01-158-0731INTERCHANGEABLE
SOLDER,TIN ALLOY
SN60PB40-WRAP2-0--025 1LB
3439-01-398-3036INTERCHANGEABLE
SOLDER,TIN ALLOY
SN63PB37WRMAP3
3439-01-471-7038INTERCHANGEABLE
SOLDER,TIN ALLOY

Frequently Asked Questions

What is NSN 3439-00-086-0203?

NSN 3439-00-086-0203 is a Solder,lead-Tin Alloy, 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 3439-00-086-0203?

NSN 3439-00-086-0203 has 2 cross-referenced part numbers: QQS571BTYPESN50 (Federal Specifications Promulgated by General Services Administration Washington DC), IPC J-STD-006 (Ipc International Inc Dba Global Electronics Association).

What NSN replaces 3439-00-086-0203?

There are 10 known substitutes for 3439-00-086-0203: 3439-00-198-3429, 3439-00-273-2536, 3439-01-008-7577 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of QQS571BTYPESN50?

Key specifications for QQS571BTYPESN50: Chemical Composition Percentage: LEAD 50.0; TIN 50.0; Wire Core Type: SOLID; Departure From Cited Designator: AS MODIFIED BY DIAMETER AND WIRE CORE TYPE; Diameter: 0.062 INCHES NOMINAL IN. 6 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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