300pcs M4 Screw Kit, Premium M4 Hex Socket Head Cap Screw Assortment with Nuts and Washers, M4 x 6mm /8mm /10mm /12mm /16mm /20mm /25mm /30mm (Black)

Great variety of screws and the included nuts really help to settle things where you want to.Didn’t torque them as hard as I could but seem like good quality.

Came exactly as mentioned

Top of the line fasteners worked well great selection of sizes with this kit highly recommended

I bought this kit to just have around for 3d printing projects. The kit is well organized and compact. Lots of lengths. Perfect for DIY or hobbyist. I like that there is a picture showing the contents on the outside as well as the inside. It makes it easy to see if I have the correct size and amount for my project.

This kit consists of the full range of M4 Hex Socket Head Cap Screws with nuts and washers normally needed. Rarely would you need a length outside the 6-30 mm in this kit.These are 4 mm X 0.7 thread. A 3 mm hex wrench is used for tightening/loosening.There are eleven grades of alloy steel used for bolts and studs. These are grade 12.9 which is second to the highest grade.Unless you have a specific reason, “Socket Head” should be ordered over “Button Head”. This is because the hex socket is deeper which lessens the chance of rounding out the head when tightening.Labeling of the parts box is much better than other parts boxes I have. Both the top and inside of the lid are labeled. This makes it easier to find this box among others you have. The inside label shows you what sizes are in what compartment when the lid is open.This kit was a great addition to my collection of parts kits. I like to immediately have the size I need when working on a project.

As not the size I needed but it was a decent buy.

If you have several 3D printers then you will find these M3 screws very handy to replace missing screws or useful when modifying your printers.

As a Maker/Hobbyist/DIY'er, I never know what size screws I might need for a particular project. Having sets like this one on hand means I am likely to be have just the right size available whenever I need it without having to run down to the hardware store. This set contains an assortment of M4 screws in various lengths between 6mm and 30mm along with nuts and flat washers. They appear to be of good quality and will be well suited to just about any hobby or home repair application. They come in a case that closes securely and is clearly labeled allowing for easy selection of the right screw. Overall, A good assortment at a good price.