PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-E-278Electrode,welding

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 3439-00-618-5796 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-00-618-5796 — this item is cataloged by the U.S. Government under National Stock Number 3439-00-618-5796. Primary manufacturer part number: MIL-E-278.
Features
  • Electrode,welding — FSC 3439
  • Outside Diameter: 0.125 INCHES NOMINAL IN
  • Weld Position for Which Designed: HORIZONTAL
  • Departure From Cited Document: AS MODIFIED BY SPECIAL FEATURES
  • Shape: ROUND
  • Material: COPPER ALLOY FILLER
  • Material Document and Classification: MIL-E-278,CL MIL-E-CUAL-B MIL SPEC SINGLE MATERIAL RESPONSE FILLER
  • Polarity Characteristic: REVERSE
Applications
  • Applications requiring Copper Alloy Filler construction
General Description

The Electrode,welding, cataloged under National Stock Number 3439-00-618-5796, is classified within Federal Supply Class 3439 (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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3439-00-618-5796
Primary Part NumberMIL-E-278
Item NameElectrode,welding
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Outside Diameter0.125 INCHES NOMINAL IN
Weld Position for Which DesignedHORIZONTAL
Departure From Cited DocumentAS MODIFIED BY SPECIAL FEATURES
ShapeROUND
MaterialCOPPER ALLOY FILLER
Material Document and ClassificationMIL-E-278,CL MIL-E-CUAL-B MIL SPEC SINGLE MATERIAL RESPONSE FILLER
Polarity CharacteristicREVERSE
Physical FormSTRAIGHT
Current TypeAC OR DC
Flux Coating TypeSHIELDED ARC
Length14.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3439-00-200-1376AWSA5.6-08 CL ECUSN-A 0.125 INTERCHANGEABLE
Electrode,welding
American Welding Society, Inc.
3439-00-247-5157 INTERCHANGEABLE
Electrode,welding
3439-00-255-8910AWSA5.6-76 ECUSN-A 0.188 10LB INTERCHANGEABLE
Electrode,welding
American Welding Society, Inc.
3439-00-262-2739AWSA5.6-79 ECUSN-C 0.156 INTERCHANGEABLE
Electrode,welding
American Welding Society, Inc.
3439-00-262-2740 INTERCHANGEABLE
Electrode,welding
3439-00-262-4267AWS A5.6 ECUSN-C 0.125 14IN INTERCHANGEABLE
Electrode,welding
American Welding Society, Inc.
3439-00-618-5797 INTERCHANGEABLE
Electrode,welding
Cross-Reference Index
Part NumberManufacturer
MIL-E-278 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
ANSI/AWS A5.13 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-E-CUAL-B 0.125 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AWS A5.6 American Welding Society, Inc. (USA)
Related Parts
3439-00-200-1376INTERCHANGEABLE
ELECTRODE,WELDING
AWSA5.6-08 CL ECUSN-A 0.125
3439-00-247-5157INTERCHANGEABLE
ELECTRODE,WELDING
3439-00-255-8910INTERCHANGEABLE
ELECTRODE,WELDING
AWSA5.6-76 ECUSN-A 0.188 10LB
3439-00-262-2739INTERCHANGEABLE
ELECTRODE,WELDING
AWSA5.6-79 ECUSN-C 0.156
3439-00-262-2740INTERCHANGEABLE
ELECTRODE,WELDING
3439-00-262-4267INTERCHANGEABLE
ELECTRODE,WELDING
AWS A5.6 ECUSN-C 0.125 14IN
3439-00-618-5797INTERCHANGEABLE
ELECTRODE,WELDING

Frequently Asked Questions

What is NSN 3439-00-618-5796?

NSN 3439-00-618-5796 is a Electrode,welding, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 3439 (No Item Name Available). Status: active.

What are the part numbers for NSN 3439-00-618-5796?

NSN 3439-00-618-5796 has 4 cross-referenced part numbers: MIL-E-278 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), ANSI/AWS A5.13 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-E-CUAL-B 0.125 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AWS A5.6 (American Welding Society, Inc.).

What NSN replaces 3439-00-618-5796?

There are 7 known substitutes for 3439-00-618-5796: 3439-00-200-1376, 3439-00-247-5157, 3439-00-255-8910 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-E-278?

Key specifications for MIL-E-278: Outside Diameter: 0.125 INCHES NOMINAL IN; Weld Position for Which Designed: HORIZONTAL; Departure From Cited Document: AS MODIFIED BY SPECIAL FEATURES; Shape: ROUND. 12 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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