280PCS 12 Sizes Copper Flat Washer, Copper Washers Assortment Kit Plain Washers with Box Fitting for Screws Bolts Fasteners

Good Copper Construction: Crush washer kit is made of good pure copper with well electrical and thermal conductivity. Copper washers is ideal for insulating steel screws from aluminum surfaces to protect hardware joints Multi Functional Usage: Copper crush washer serves as load distributor, spacer, wear pad, pre load indicator and locking device. Copper crush washer effectively reduces vibration in bolted connections, prevents fastener loosening and extends the usage time of your hardware 12 Sizes 280Pcs Pack: Copper flat washer sealing ring covers a full range of common sizes from M5 to M20 (e.g., M5×9×1mm, M20×26×1.5mm). Crush washer assortment with abundant quantity, meets daily repair, DIY and industrial needs, no more frequent trips to the hardware store Surface and Fastener Protection: Brass washers distribute the pressure of nuts and screws evenly, prevent surface damage to wood, metal and plastic materials. Brass washer is suitable for applications where the hole diameter is larger than the fixing nut size Organized Storage Box Included: Copper crush washer kit comes with a compact divided storage box (17.5×10×2.3cm) for easy size sorting and access. Keeps washers neat and portable, suitable for home workshops, auto repair shops and construction sites

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