Suitable screw/bolt size: M12; Overall size: 13 x 28 x 10mm (inner diameter * outer diameter * T) Made of black oxide carbon steel, with excellent cutting performance, high hardness, good toughness, and wear resistance after quenching and tempering. Flat washers are generally used to evenly distribute the load of threaded bolts, screws, and nuts, and to tighten fasteners. They are intended to be used under the head of a bolt or nut over the entire area of support to provide a smooth surface and prevent pull-out. Widely used in the machinery industry, automobiles, home decoration, electrical maintenance, furniture repair, store and outdoor construction, and threaded bolt connections. * Anonymous delivery! Free shipping ✨ * Instant purchase welcome, silent purchase at midnight OK ◎ * Limited to one item, first come, first served * Welcome to bulk purchases, feel free to comment ・Please understand and purchase due to home storage and shipping in simple packaging (⁎ᵕᴗᵕ⁎) ・Please check the actual photos for the condition of the product ♪ Although it is new and unused, it has been opened to check the contents! ※In order to sell at a slightly lower price, the product may be shipped without the box due to shipping costs. #chappy shop's product list is here ✨☜ uxcell M12 Carbon Steel Flat Washer Oxidized Grade 8.8 Alloy Steel Extra Thick Fastener for Machinery Industry Automobile 5 pieces 13 x 28 x 10mm Black 18-46 0041