PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4491Nozzle,welding

Dover Corp · NSN 3431-01-442-6783 · FSC 3431 · No Item Name Available
Verified by PartsTable
NSN 3431-01-442-6783 — this item is cataloged by the U.S. Government under National Stock Number 3431-01-442-6783. Primary manufacturer part number: 4491.
Features
  • Nozzle,welding — FSC 3431
  • Orifice Diameter: 0.969 INCHES NOMINAL IN
  • Style Designator: STRAIGHT
  • Material: COPPER ALLOY
  • 1 verified cross-reference
  • Primary manufacturer: Dover Corp
Applications
  • Applications requiring Copper Alloy construction
General Description

The Nozzle,welding, cataloged under National Stock Number 3431-01-442-6783, is classified within Federal Supply Class 3431 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is Dover Corp. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3431-01-442-6783
Primary Part Number4491
Item NameNozzle,welding
FSC / FSG3431 / 34 — No Item Name Available
ManufacturerDover Corp
StatusACTIVE
Orifice Diameter0.969 INCHES NOMINAL IN
Style DesignatorSTRAIGHT
MaterialCOPPER ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
8455-00-257-4371 INTERCHANGEABLE
Bar,service Ribbon
8455-00-257-4372 INTERCHANGEABLE
Bar,service Ribbon
2040-00-391-4459 INTERCHANGEABLE
Lever
5330-00-411-9094 INTERCHANGEABLE
Retainer,packing
5305-01-155-97704491 INTERCHANGEABLE
Screw,machine
Prestolite Electric Inc
5805-01-175-2447247-12 INTERCHANGEABLE
Telephone,lear
Hose-Mccann Telephone Co, Inc
6230-01-396-8900ACR-L-32 INTERCHANGEABLE
Light,marker,field,portable
Acr Electronics, Inc. Dba Acr Electronics Inc
6515-01-542-34914491 INTERCHANGEABLE
Brace,leg
Mueller Sports Medicine, Inc
6810-01-583-1070 INTERCHANGEABLE
Carbonic Dihydrazid
Cross-Reference Index
Part NumberManufacturer
4491 Dover Corp (USA)
Related Parts
8455-00-257-4371INTERCHANGEABLE
BAR,SERVICE RIBBON
8455-00-257-4372INTERCHANGEABLE
BAR,SERVICE RIBBON
2040-00-391-4459INTERCHANGEABLE
LEVER
5330-00-411-9094INTERCHANGEABLE
RETAINER,PACKING
5305-01-155-9770INTERCHANGEABLE
SCREW,MACHINE
4491
5805-01-175-2447INTERCHANGEABLE
TELEPHONE,LEAR
247-12
6230-01-396-8900INTERCHANGEABLE
LIGHT,MARKER,FIELD,PORTABLE
ACR-L-32
6515-01-542-3491INTERCHANGEABLE
BRACE,LEG
4491
6810-01-583-1070INTERCHANGEABLE
CARBONIC DIHYDRAZID

Frequently Asked Questions

What is NSN 3431-01-442-6783?

NSN 3431-01-442-6783 is a Nozzle,welding, manufactured by Dover Corp, classified under FSC 3431 (No Item Name Available). Status: active.

What are the part numbers for NSN 3431-01-442-6783?

NSN 3431-01-442-6783 has 1 cross-referenced part number: 4491 (Dover Corp).

What NSN replaces 3431-01-442-6783?

There are 9 known substitutes for 3431-01-442-6783: 8455-00-257-4371, 8455-00-257-4372, 2040-00-391-4459 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4491?

Key specifications for 4491: Orifice Diameter: 0.969 INCHES NOMINAL IN; Style Designator: STRAIGHT; Material: COPPER ALLOY; Overall Length: 3.938 INCHES NOMINAL IN. 5 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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