KP3705-1 - Lincoln Viking 3250D FGS Side Window Blackout Covers (Pair)

Technical Overview of the Lincoln Electric KP3705-1

The Lincoln Electric KP3705-1 Side Window Covers are a specialized accessory engineered specifically for the Viking™ 3250D FGS™ Series welding helmets. The 3250D FGS is renowned for its integrated side windows, which provide shade 5 peripheral vision to enhance operator safety and spatial awareness in open environments. However, in specific industrial applications—particularly those involving high-amperage welding or multi-operator fabrication cells—peripheral light can become a source of distraction or visual interference. The KP3705-1 covers address this variable by allowing the operator to selectively occlude the side windows, converting the helmet into a traditional tunnel-view configuration when necessary.

Manufactured from a durable, lightweight opaque polymer, these covers are designed to clip securely into the interior recesses of the helmet shell, directly over the shade 5 side lenses. The internal clip-in design ensures that the external profile of the helmet remains streamlined, preventing snagging hazards while maintaining the aesthetic integrity of the Viking shell. Because they are installed internally, they are protected from direct spatter and impact, ensuring a long service life. The precise molding guarantees a light-tight seal, effectively eliminating 100% of light transmission through the side panels.

This accessory is critical for facilities that utilize the 3250D FGS across diverse welding stations. In a single-operator booth, the side windows offer superior safety. In a gang-welding setup or a tight fabrication cell where adjacent arcs are struck frequently, the KP3705-1 covers mitigate the "flicker" effect of peripheral arc flash, reducing eye fatigue and maintaining the operator's pupil dilation for the main weld zone. The kit includes both left and right covers, providing a complete solution for one helmet.

Installation and Compatibility

Installation of the KP3705-1 is tool-free and can be performed in seconds. The covers feature molded retention tabs that snap into the corresponding geometry of the 3250D FGS shell. They are strictly compatible with the FGS series and will not fit standard Viking 3350, 2450, or 1840 series helmets, nor are they compatible with older legacy models. This specificity ensures a rattle-free fit that does not interfere with the operation of the main auto-darkening filter (ADF) or the grind shield mechanism.