PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

BERDS-1Diffuser,gas Shielded Arc Weldin

Airgas - North Central, Inc. Dba Airgas · NSN 3431-01-646-8991 · FSC 3431 · No Item Name Available
Verified by PartsTable
NSN 3431-01-646-8991 — this item is cataloged by the U.S. Government under National Stock Number 3431-01-646-8991. Primary manufacturer part number: BERDS-1.
Features
  • Diffuser,gas Shielded Arc Weldin — FSC 3431
  • 3 verified cross-references
  • Primary manufacturer: Airgas - North Central, Inc. Dba Airgas
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Diffuser,gas Shielded Arc Weldin, cataloged under National Stock Number 3431-01-646-8991, is classified within Federal Supply Class 3431 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Airgas - North Central, Inc. Dba Airgas. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3431-01-646-8991
Primary Part NumberBERDS-1
Item NameDiffuser,gas Shielded Arc Weldin
FSC / FSG3431 / 34 — No Item Name Available
ManufacturerAirgas - North Central, Inc. Dba Airgas
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6210-00-111-69711050A1 INTERCHANGEABLE
Light,indicator
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
2590-00-620-992817SW00015A INTERCHANGEABLE
Switch,beam Selecting,headlight
Payhauler Corp
5940-01-254-7900DS1 INTERCHANGEABLE
Marker Strip,terminal Board
Trompeter Electronics, Inc.
1730-01-266-2143209-070-196-103 INTERCHANGEABLE
Cover,aircraft Ground Servicing
Bell Textron Inc
4220-01-439-8217DS-1 INTERCHANGEABLE
Diver-Held Sonar System
Rje International, Inc. Dba Rje International
7490-01-485-2112DS-1 INTERCHANGEABLE
Shredding Machine,paper
Whitaker Brothers Business Machines, Inc.
6520-01-509-1019 INTERCHANGEABLE
Automatic Spindle
9140-01-524-5174 INTERCHANGEABLE
Diesel Fuel
1005-01-641-2412DS-1 INTERCHANGEABLE
Guide,cartridge,small Arms
Dewey, J Manufacturing Company Inc
8030-01-680-7279DS1 INTERCHANGEABLE
Sealing Compound
Panduit Corp.
Cross-Reference Index
Part NumberManufacturer
DS-1 Bernard Welding (USA)
BERDS-1 PRIMARY Airgas - North Central, Inc. Dba Airgas (USA)
RIA155981 Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA)
Related Parts
6210-00-111-6971INTERCHANGEABLE
LIGHT,INDICATOR
1050A1
2590-00-620-9928INTERCHANGEABLE
SWITCH,BEAM SELECTING,HEADLIGHT
17SW00015A
5940-01-254-7900INTERCHANGEABLE
MARKER STRIP,TERMINAL BOARD
DS1
1730-01-266-2143INTERCHANGEABLE
COVER,AIRCRAFT GROUND SERVICING
209-070-196-103
4220-01-439-8217INTERCHANGEABLE
DIVER-HELD SONAR SYSTEM
DS-1
7490-01-485-2112INTERCHANGEABLE
SHREDDING MACHINE,PAPER
DS-1
6520-01-509-1019INTERCHANGEABLE
AUTOMATIC SPINDLE
9140-01-524-5174INTERCHANGEABLE
DIESEL FUEL
1005-01-641-2412INTERCHANGEABLE
GUIDE,CARTRIDGE,SMALL ARMS
DS-1
8030-01-680-7279INTERCHANGEABLE
SEALING COMPOUND
DS1
8030-01-682-5491INTERCHANGEABLE
GASKET FORMING COMPOUND
DS1

Frequently Asked Questions

What is NSN 3431-01-646-8991?

NSN 3431-01-646-8991 is a Diffuser,gas Shielded Arc Weldin, manufactured by Airgas - North Central, Inc. Dba Airgas, classified under FSC 3431 (No Item Name Available). Status: active.

What are the part numbers for NSN 3431-01-646-8991?

NSN 3431-01-646-8991 has 3 cross-referenced part numbers: DS-1 (Bernard Welding), BERDS-1 (Airgas - North Central, Inc. Dba Airgas), RIA155981 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).

What NSN replaces 3431-01-646-8991?

There are 11 known substitutes for 3431-01-646-8991: 6210-00-111-6971, 2590-00-620-9928, 5940-01-254-7900 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of BERDS-1?

Key specifications for BERDS-1: Part Name Assigned by Controlling Agency: MIG GUN DIFFUSER; End Item Identification: 4940-01-496-1038. 2 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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