About this item 【Precision Metric Sizes】This m4 screw assortment includes m4 machine screws in six lengths: M4 x 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, with deep, burr‑free threads and <0.01mm tolerance. 【Industrial‑Grade Strength】Made from 12.9 Grade Alloy Steel, this m4 screw kit features m4 bolts that resist wear and corrosion under heavy loads. 【Oil-Free & Rust-Proof】Black zinc plating on these m4 socket head screws (4mm screws) provides rust resistance without oily residue, keeping hands and projects clean indoors or out. 【Versatile Multi‑Project Use】Ideal for 3D printers, CNC machinery, RC models, electronics, furniture assembly, bike maintenance, and auto repairs. This m4 socket head screws set and m4 scew with nut deliver reliable fastening for workshops and hobbyists. 【Organized Storage Case】Compartmentalized plastic box with clear labels keeps all components organized. This m4 screw set includes m4 bolts and nuts and m4 socket head cap screw for a complete, ready‑to‑use assortment. Overview Size: M4 320pcs Color: Black Material: Alloy Steel Brand: Kernmax Item dimensions L x W x H: 7.87 x 4.17 x 0.67 inches
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