The Kadrick 1,400-Piece M4 Screws, Nuts Washers Assortment Kit is designed for precision, durability, and convenience. Featuring both button head and cap head hex socket screws in lengths from 6mm to 40mm, this set is made from 10.9 12.9 grade alloy steel for high strength and reliable performance. Perfect for 3D printing, electronics, robotics, furniture assembly, and general DIY projects. ? Features Benefits Product Details ? Includes 4 sizes of M4 screws, thread pitch 0.7mm, thread diameter 4mm. High Quality ? Made of 10.9 12.9 grade alloy steel, offering superior strength and precise threading for secure fastening. Good Storage Assortment ? Packaged in a sturdy, reusable plastic organizer with labeled compartments for quick size selection. Wide Applications ? Suitable for 3D printers, electronics repair, hobby projects, furniture assembly, and general household use. Brand Guarantee ? Kadrick specializes in high-quality fasteners, rigorously tested for reliability. Includes 24-month after-sales warranty for peace of mind. ? What?s Included 1,400 total pieces: M4 hex socket button head cap head screws, nuts, and washers Screw lengths from 6mm to 40mm Durable, compartmented storage case ?? Why Choose This Kit? With a full range of M4 screws, premium alloy steel construction, and a well-organized storage case, the Kadrick 1400-Piece Assortment Kit is a reliable solution for professionals and DIYers. Strong, versatile, and backed by a brand warranty, it?s a toolbox essent