This Comdox 500-piece fastener kit is exactly what every DIYer, mechanic, or hobbyist needs in their toolbox! You get a comprehensive assortment of M3, M4, and M5 hex head socket cap screws and matching nuts in the strongest 12.9 grade alloy steel. The black oxide finish provides good corrosion resistance while looking professional. Having all these sizes organized in the included plastic storage box means no more digging through messy coffee cans or making last-minute hardware store runs. The 12.9 grade is seriously strong - we're talking the highest grade available for alloy steel bolts, perfect for high-stress applications where reliability matters. The socket cap design allows for higher torque application than Phillips or slotted heads, and the hex key drive means less cam-out and stripped heads. The organization is smart - having M3, M4, and M5 sizes covers most common projects from electronics and small assemblies to automotive and furniture building. The quality is noticeable - clean threads, consistent sizing, and proper heat treatment that means these bolts won't snap under pressure. Whether you're working on RC cars, furniture assembly, automotive projects, or general repairs, having this assortment on hand saves time, frustration, and multiple trips to the store. It's one of those toolbox essentials that pays for itself the first time you need an odd size on a weekend when stores are closed.
Free 30-day returns 
Free 30-day returns
