PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D440Soldering Gun

Apex Tool Group, Llc · NSN 3439-00-729-6770 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-00-729-6770 — this item is cataloged by the U.S. Government under National Stock Number 3439-00-729-6770. Primary manufacturer part number: D440.
Features
  • Soldering Gun — FSC 3439
  • Current Type: AC
  • Nondefinitive Spec/std Data: 2 CLASS AND B ASSEMBLY
  • Operating Voltage in Volts: 115.000 NOMINAL
  • Plug Type: 3-WIRE
  • Phase: SINGLE
  • Features Provided: SPOTLIGHT AND DUAL HEAT CONTROL AND THERMOSTATICALLY CONTROLLED
  • Mounting Thread Diameter: 0.313 INCHES NOMINAL AND 0.375 INCHES NOMINAL IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Soldering Gun, cataloged under National Stock Number 3439-00-729-6770, is classified within Federal Supply Class 3439 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Apex Tool Group, Llc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN3439-00-729-6770
Primary Part NumberD440
Item NameSoldering Gun
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerApex Tool Group, Llc
StatusACTIVE
Current TypeAC
Nondefinitive Spec/std Data2 CLASS AND B ASSEMBLY
Operating Voltage in Volts115.000 NOMINAL
Plug Type3-WIRE
PhaseSINGLE
Features ProvidedSPOTLIGHT AND DUAL HEAT CONTROL AND THERMOSTATICALLY CONTROLLED
Mounting Thread Diameter0.313 INCHES NOMINAL AND 0.375 INCHES NOMINAL IN
Handle TypePISTOL GRIP
Mounting MethodTHREAD
Tip ShapeLOOP
Tip RemovabilityREMOVABLE
Frequency in Hertz60.000 NOMINAL
Mounting Threads Per Inch24
Diameter0.161 INCHES NOMINAL AND 0.372 INCHES NOMINAL AND 0.263 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3439-00-004-0915 INTERCHANGEABLE
Soldering Gun
5950-00-113-7590D440 INTERCHANGEABLE
Transformer,power
Payne Magnetics, Inc.
2940-00-364-4956SA15417 INTERCHANGEABLE
Filter Element,fluid
Parker-Hannifin Corporation
3439-00-542-0396 INTERCHANGEABLE
Soldering Gun
3439-00-542-0446 INTERCHANGEABLE
Soldering Gun
3439-00-618-6623 INTERCHANGEABLE
Soldering Gun
3439-00-618-6624 INTERCHANGEABLE
Soldering Gun
3439-00-640-227910106117-2 INTERCHANGEABLE
Tip,electric Soldering Gun
Us Army Aviation and Missile Command
3439-00-982-1738 INTERCHANGEABLE
Soldering Gun
6830-01-420-4012 INTERCHANGEABLE
Calibrating Gas Mixture
Cross-Reference Index
Part NumberManufacturer
D440 Apex Tool Group, Llc (USA)
D440 Cooper Industries Inc Weller/cooper Tools Div (USA)
WS564 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
3439-00-004-0915INTERCHANGEABLE
SOLDERING GUN
5950-00-113-7590INTERCHANGEABLE
TRANSFORMER,POWER
D440
2940-00-364-4956INTERCHANGEABLE
FILTER ELEMENT,FLUID
SA15417
3439-00-542-0396INTERCHANGEABLE
SOLDERING GUN
3439-00-542-0446INTERCHANGEABLE
SOLDERING GUN
3439-00-618-6623INTERCHANGEABLE
SOLDERING GUN
3439-00-618-6624INTERCHANGEABLE
SOLDERING GUN
3439-00-640-2279INTERCHANGEABLE
TIP,ELECTRIC SOLDERING GUN
10106117-2
3439-00-982-1738INTERCHANGEABLE
SOLDERING GUN
6830-01-420-4012INTERCHANGEABLE
CALIBRATING GAS MIXTURE

Frequently Asked Questions

What is NSN 3439-00-729-6770?

NSN 3439-00-729-6770 is a Soldering Gun, manufactured by Apex Tool Group, Llc, classified under FSC 3439 (No Item Name Available). Status: active.

What are the part numbers for NSN 3439-00-729-6770?

NSN 3439-00-729-6770 has 3 cross-referenced part numbers: D440 (Apex Tool Group, Llc), D440 (Cooper Industries Inc Weller/cooper Tools Div), WS564 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 3439-00-729-6770?

There are 10 known substitutes for 3439-00-729-6770: 3439-00-004-0915, 5950-00-113-7590, 2940-00-364-4956 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of D440?

Key specifications for D440: Current Type: AC; Overall Width: 3.000 INCHES MAXIMUM IN; Nondefinitive Spec/std Data: 2 CLASS AND B ASSEMBLY; Operating Voltage in Volts: 115.000 NOMINAL. 18 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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