(100pcs) M3 x 8 mm Red Fiber Washer, (ID:3.2mm OD:8.4mm T:0.7mm)

Overview

The M3 x 8 mm Red Fiber Washer, (ID:3.2mm OD:8.4mm T:0.7mm) is a classic, high-performance insulating component engineered for applications requiring electrical isolation, moderate heat resistance, and secure joint sealing. Punched from durable vulcanized cellulose fiber, these traditional red washers combine the flexibility of a gasket with the dielectric and thermal resilience needed for demanding electrical and mechanical assemblies.

Thermal Resistance & Electrical Insulation

Unlike standard plastic washers that can deform under sustained elevated temperatures, vulcanized fiber maintains its structural integrity in warm operating environments. Its non-conductive dielectric properties provide a reliable barrier against electrical current, preventing accidental short circuits when mounting printed circuit boards (PCBs), electrical switches, transformers, or live metal chassis components.

Gasket Sealing & Load Cushioning

The fibrous structure of the material allows it to compress slightly when torqued, filling microscopic irregularities on mating surfaces to act as a light-duty fluid or dust seal. Additionally, it cushions fastener heads against delicate surfaces, preventing scratching and distributing clamping pressure evenly.

Common Applications

• Electronics & Electrical Panels: Insulating component leads, mounting PCBs, and isolating terminal screws from conductive housings.

• Power Supplies & Transformers: Providing a heat-resistant, non-conductive spacer around high-temperature components.

• Instrumentation & Gauge Repair: Serving as traditional sealing gaskets or insulating shims in vintage equipment and test gear.

• General Workshop & Hobby Builds: Acting as flat, non-marring spacers where light sealing or thermal separation is required.