Bemaka 550-Piece M3 Screw Kit, 304 Stainless Steel, 7 Sizes with Hex Wrench

M3 fasteners in seven lengths—from 6 mm to 30 mm—give this Bemaka assortment options for a range of small assembly and repair tasks. The kit combines socket head cap screws with matching nuts and washers, all made from 304 stainless steel.

A labeled storage box keeps the components organized by type, while the included hex wrench is ready for installing the screws. With 550 pieces in the set, you can keep several M3 lengths and matching hardware together for projects around the home or workshop.

Technical overview

• Thread size: M3
• Screw lengths: 6, 8, 12, 16, 20, 25, and 30 mm
• Material: 304 stainless steel
• Total pieces: 550, including 130 screws, 140 nuts, 140 lock washers, and 140 flat washers
• Head and drive: Socket head with hex drive
• Included tool: Hex wrench
• Storage: Labeled plastic box

The stainless-steel construction is described as corrosion- and rust-resistant, making these fasteners useful for projects where moisture may be a consideration. The set’s range of lengths helps match the fastener to different assembly depths, and the included nuts and washers provide corresponding hardware in the same kit.

What it works with

The M3 assortment is intended for repairs and builds involving precision machinery, furniture, toys, buildings, 3D printers, electronic products, and household appliances. For example, when assembling a small 3D printer component or repairing an appliance, you can choose among the listed screw lengths and keep nuts and washers on hand for the connection. The hex socket drive is suited to turning the screws with the included wrench.

Compared with buying one screw length at a time, an assortment brings multiple M3 lengths and related hardware into one organized set. That approach is useful for general repair and DIY work where the required length can vary from one task to another.

Practical tips

Before starting an assembly, identify the required M3 screw length and keep the matching nut or washer close at hand. The labeled box helps sort components during a project and makes it easier to return them to their place afterward. Use the hex wrench to engage the socket head, and select a length appropriate to the parts being joined.

Buyers often highlight the variety of sizes and usefulness for DIY projects. Feedback on durability and size is mixed, and some buyers mention that the storage dividers can shift, so it can help to keep the box level while selecting parts.

When it makes sense

This kit makes sense for a home repair bench, electronics work area, or workshop that regularly handles M3 fasteners. Rather than keeping only a single screw length on hand, you get seven listed lengths plus nuts, lock washers, and flat washers in one labeled box. It’s a practical fit for projects that call for metric socket head screws and a selection of matching hardware.