4780 - Bernard Style 4780 Hex Nut Insulator Replacement (5-Pack)

Name: Bernard Style 4780 Hex Nut Insulator Replacement (5-Pack)
Brand: Bernard Style
SKU: GEN4780
Price: 17.70 CAD
Availability: InStock

~~$4.92/ea~~ Save 28% ($1.38)$3.54/eaPack of 5 — $17.70

Save an additional $0.89

Join the Nation of Welders Program

SKU: GEN4780 Categories: Mig Accessories, Mig Consumables, Welder Accessories

OVERVIEW

Technical Overview: Bernard Style 4780 Hex Nut Insulator

The GEN4780 is a high-performance aftermarket replacement for the Bernard 4780 hex nut insulator, specifically designed for use with 300 Amp and 400 Amp Bernard-style MIG guns. This component is critical for the electrical isolation of the nozzle assembly, preventing the nozzle from becoming electrically

Additional Information
Brand:Bernard Style
Item:Insulator
Packaging Description:pack of 5
Compatible Amperage:300 Amp, 400 Amp
Part Number:4780
Material:Rubber Composite
Shape:Hex Nut

INCLUDED

5 x Hex Nut Insulators (Replaces Bernard 4780)

APPLICATIONS

MIG/MAG welding operations using Bernard-style guns
General fabrication and structural steel welding
Heavy equipment repair and maintenance
Automotive and transportation manufacturing
Industrial welding shops requiring 300A-400A gun parts

FAQ

These insulators are designed to fit Bernard-style MIG guns rated for 300 Amps and 400 Amps, specifically those that utilize the 4780 part number.

This product is sold as a package of 5 insulators.

The insulator electrically isolates the welding nozzle from the electrically live gas diffuser and contact tip, preventing short circuits and protecting the nozzle.

No, this is a high-quality generic or aftermarket replacement part designed to meet or exceed the specifications of the original Bernard 4780.

It is manufactured from a durable, high-heat resistant rubber composite material designed to withstand the thermal stress of welding.

The hex nut shape allows for a secure mechanical fit that prevents the insulator from rotating or slipping during use, while also making it easier to install and remove.

You should check your gun's manual. While it is rated for 300/400 Amp guns, fitment depends on the specific front-end consumable series used by your torch.

No reviews yet

Nobody has rated this product yet. If you have run it on the job, yours is the review the next buyer reads.

Be the first to review

Used this product on the job? Tell other welders how it held up.