Hover cursor over image to view larger picture


WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Bernard™ Centerfire™ Series Diffuser

Airgas Part #:BERDS-1T

Manufacturer Part #:DS-1T

$15.84 /Each
Package Size Options
$158.40 Pack 10 Each / Pack
Enter multiples of 10 Each

Item Details

  • Bernard™ Centerfire™ small gas diffuser designed offers tapered, secure mating with Centerfire Contact Tips for better electrical conductivity. For use with Bernard, Lincoln® and Tweco® MIG guns. Consult spec sheet for compatibility with specific Lincoln and Tweco gun models.


  • No tools required to replace tip or nozzle
  • Drop-in tip with no threads means quick change after burn back, reducing down time
  • Large diameter tip base and tapered seat provides better electrical conductivity and heat transfer
  • Spatter shield within nozzle protects diffuser and gives smoother, less turbulent gas flow
  • Solid, concentric relationship between tip and nozzle keeps tip centered even after hard use... and abuse
  • Threaded nozzle holds tip fixed at 1/4 in or 1/8 in recess, flush, or 1/8 in stickout
  • Complete family of tips and nozzles is available to meet most of your welding needs
  • All components manufactured with pride in the USA


  • Brass


  • For use with mild steel, aluminum or stainless steel wire
  • For medium to heavy-duty MIG welding applications


  • WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Product Attributes

Consumables Type

» Diffuser

MIG Gun Model

» Lincoln® Magnum® 400
» Tweco® No. 3
» Tweco® Spraymaster 450
» Lincoln® Magnum® 300
» Tweco® Tuff-n-Lite
» Tweco®No. 4
» Tweco® Supra XT


» Centerfire™