PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILW13768TYPE1Welding Machine,arc

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 3431-00-163-4345 · FSC 3431 · No Item Name Available
Verified by PartsTable
NSN 3431-00-163-4345 — this item is cataloged by the U.S. Government under National Stock Number 3431-00-163-4345. Primary manufacturer part number: MILW13768TYPE1.
Features
  • Welding Machine,arc — FSC 3431
  • Power Source: GASOLINE ENGINE
  • Maximum Current at Specified Voltage: 400 AMP AT 40 V V
  • Power Output Rating: 3.0 KILOWATTS
  • Output Voltage Rating in Volts: 115.0 NOMINAL
  • Minimum Current at Specified Voltage: 50 AMP AT 20 V V
  • Design Type: GENERATOR
  • Arc Current Type: DC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Welding Machine,arc, cataloged under National Stock Number 3431-00-163-4345, is classified within Federal Supply Class 3431 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 29 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3431-00-163-4345
Primary Part NumberMILW13768TYPE1
Item NameWelding Machine,arc
FSC / FSG3431 / 34 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Power SourceGASOLINE ENGINE
Maximum Current at Specified Voltage400 AMP AT 40 V V
Power Output Rating3.0 KILOWATTS
Output Voltage Rating in Volts115.0 NOMINAL
Minimum Current at Specified Voltage50 AMP AT 20 V V
Design TypeGENERATOR
Arc Current TypeDC
Engine Manufacturer Identifying NumberANY ACCEPTABLE
Maximum Current at Specified Voltage400 AMP AT 40 V V
Output Current TypeDC
Output Current Rating in Amps300.0 NOMINAL
Design TypeGENERATOR
Departure From Cited DesignatorCDRS,CDRT
Nondefinitive Spec/std Data1 TYPE
Departure From Cited DesignatorCDRS,CDRT
Reference Number Differentiating CharacteristicsATJL,AYHQ,CDRZ
Nondefinitive Spec/std Data1 TYPE
Reference Number Differentiating CharacteristicsATJL,AYHQ,CDRZ
Power Output Rating3.0 KILOWATTS
Output Current TypeDC
Output Voltage Rating in Volts115.0 NOMINAL
Output Current Rating in Amps300.0 NOMINAL
Mounting TypeSKID
Engine Manufacturer NameANY ACCEPTABLE
Power SourceGASOLINE ENGINE
Engine Manufacturer NameANY ACCEPTABLE
Arc Current TypeDC
Engine Manufacturer Identifying NumberANY ACCEPTABLE
Minimum Current at Specified Voltage50 AMP AT 20 V V
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
3431-00-273-3713 INTERCHANGEABLE
Welding Machine,arc
3431-00-360-2790 INTERCHANGEABLE
Welding Machine,arc
3431-00-828-80026WD43AG INTERCHANGEABLE
Welding Machine,arc
General Electric Company
3431-00-991-2961LEW300 INTERCHANGEABLE
Welding Machine,arc
Libby Power Systems, Llc
Cross-Reference Index
Part NumberManufacturer
MILW13768TYPE1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
GR300S Hobart Bros Co (USA)
Related Parts
3431-00-273-3713INTERCHANGEABLE
WELDING MACHINE,ARC
3431-00-360-2790INTERCHANGEABLE
WELDING MACHINE,ARC
3431-00-828-8002INTERCHANGEABLE
WELDING MACHINE,ARC
6WD43AG
3431-00-991-2961INTERCHANGEABLE
WELDING MACHINE,ARC
LEW300

Frequently Asked Questions

What is NSN 3431-00-163-4345?

NSN 3431-00-163-4345 is a Welding Machine,arc, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 3431 (No Item Name Available). Status: active.

What are the part numbers for NSN 3431-00-163-4345?

NSN 3431-00-163-4345 has 2 cross-referenced part numbers: MILW13768TYPE1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), GR300S (Hobart Bros Co).

What NSN replaces 3431-00-163-4345?

There are 4 known substitutes for 3431-00-163-4345: 3431-00-273-3713, 3431-00-360-2790, 3431-00-828-8002 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILW13768TYPE1?

Key specifications for MILW13768TYPE1: Power Source: GASOLINE ENGINE; Maximum Current at Specified Voltage: 400 AMP AT 40 V V; Power Output Rating: 3.0 KILOWATTS; Output Voltage Rating in Volts: 115.0 NOMINAL. 29 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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