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

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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 jointsMulti 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 hardware12 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 storeSurface 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 sizeOrganized 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 sitesSpecifications: Material: Copper Type: Flat washer ID*OD*Thickness & Quantity: M5*9*1mm 30pcs M6*10*1mm 30pcs M6*12*1mm 20pcs M8*12*1mm 30pcs M10*14*1mm 30pcs M8*14*1mm 20pcs M12*16*1mm 25pcs M14*18*1mm 25pcs M12*18*1.5mm 20pcs M16*20*1.5mm 20pcs M16*22*1.5mm 15pcs M20*26*1.5mm 15pcs Box Size: 17.5 x 10 x 2.3cm / 6.89 x 3.93 x 0.9"Package Includes: 1 set x Washers