Weld Mount 3" White Round Poly Insulation Washer - 50-Pack

The Weld Mount 3" White Round Poly Insulation Washer - 50-Pack (MPN 102450) is an essential fastening component designed for marine, automotive, and industrial applications where electrical isolation and corrosion resistance are critical. These washers serve as a protective barrier between metal fasteners and conductive surfaces, preventing galvanic corrosion and unwanted electrical grounding. Professionals who work in saltwater environments, RV systems, boat wiring, and heavy equipment assembly rely on quality insulation washers to extend the lifespan of their installations and maintain system integrity.

Manufactured from durable white polypropylene, this 3-inch round washer features excellent chemical resistance and electrical insulation properties that meet the demands of challenging environments. The polypropylene material resists UV degradation, saltwater corrosion, and temperature fluctuations, making it ideal for permanent outdoor installations. Each washer in this 50-pack provides consistent thickness and diameter for reliable load distribution beneath bolt and screw heads, effectively isolating fasteners from aluminum, steel, and composite surfaces while preventing the oxidation and corrosion that results from direct metal-to-metal contact.

Boat builders, RV technicians, and industrial maintenance teams benefit most from bulk 50-pack quantities, allowing inventory on hand for routine repairs and system upgrades. The 3-inch diameter accommodates standard fastener sizes used in structural and electrical applications, making this washer compatible with most through-bolt and stud assemblies. Installation is straightforward—simply place the washer between the fastener head and the mounting surface before tightening. The white color aids in visual inspection and makes these washers easy to identify in inventory, while the generous 50-piece count ensures you have adequate supply for both planned projects and emergency field repairs.