wugongshan 1080 Pcs Screws Bolts and Nuts Assortment Kit, Metric Machine Screws and Nuts and Flat Washers, M3/M4/M5/M6 Cross Slotted Round Head Bolts Sets

A well-stocked metric fastener kit that actually covers the bases

It never fails: a project stalls because I’m missing one small screw or nut. That’s why I keep a dedicated assortment on the shelf, and lately I’ve been using the wugongshan 1080-piece metric fastener kit. It’s a straightforward, no-nonsense collection of M3–M6 machine screws, matching nuts, and flat washers in a tidy box. No flashy gimmicks—just a broad spread of common sizes in a silver, corrosion-resistant finish.

What you get (and what you don’t)

The kit is built around cross-slotted (Phillips-style) round/pan head machine screws with nuts and flat washers to match. The size spread hits a lot of everyday needs:

• M3 screws in 6, 10, 14, and 20 mm
• M4 screws in 10, 20, 25, and 30 mm
• M5 screws in 20, 30, and 40 mm
• M6 screws in 10, 20, 30, and 40 mm
• Corresponding nuts and flat washers for M3–M6

All told, it’s 1080 pieces, about 900 grams of hardware. The threads are the standard coarse metric pitches for these diameters, so compatibility with typical metric hardware is what you’d expect. There are no countersunk or hex socket heads here—this is a round/pan head, cross-slot-only affair—so if you prefer Allen/hex-drive hardware, this kit isn’t going to replace that.

One limitation worth noting: the lengths skew short-to-medium. That’s perfect for electronics, brackets, 3D printer assemblies, and furniture repairs, but you won’t find longer fasteners (50 mm and up) for deeper stackups or thick timbers.

Build quality and drive feel

Across multiple sizes, the machining quality is better than “bulk assortment” standards I’ve used in the past. Threads are clean, burrs are minimal, and the drive slots are cut deep enough to engage properly. Using a PH1 driver on M3/M4 and PH2 on M5/M6, I didn’t experience cam-out unless I intentionally mis-sized the driver or over-torqued in soft materials.

The metal finish is a uniform silver plating that shrugs off fingerprints and doesn’t feel oily out of the box. Edges on the washers are smooth enough not to cut into softer workpieces, and the nuts spin freely without that gritty start-up you sometimes get in cheaper assortments.

There are no strength markings on the heads, so I treat these as general-purpose, ungraded machine screws. They’re plenty for enclosures, brackets, fixtures, and interior hardware—but I wouldn’t spec them for high-load or safety-critical assemblies.

Organization: the silent feature that matters

An assortment lives or dies by its box. Here, each size and component gets its own compartment, and the counts are generous. The lid closes flat and the dividers kept parts in their lanes during normal handling and a couple of trips to the job box. That said, like many plastic organizers, the hinges and latch feel more “consumer organizer” than “contractor crate.” I wouldn’t toss it off a bench or pack it loose with heavy tools. A strip of painter’s tape across the front before transport is cheap insurance, or transfer the set to a sturdier organizer if you’re more mobile than bench-bound.

If you’re new to metric fasteners, I recommend labeling the underside of the lid with a fine-tip marker or keeping a small metric screw gauge in the box. It speeds up grabbing the right length and thread, especially between similar sizes like M4x20 and M5x20.

In use: where it shines

I put the kit to work across a handful of typical tasks:

• 3D printer maintenance: M3 hardware is the lifeblood of hobby printers. Swapping in M3x10 and M3x20 with washers for belt tensioners and fan mounts was painless. Threads matched perfectly with existing components.

• Electronics and small fixtures: Mounting a Raspberry Pi to an acrylic panel and adding standoffs for a small display took a mix of M3 lengths and washers to tune clamping force. The pan heads sit nicely without biting into acrylic when paired with the included washers.

• Furniture repairs: Reattaching a loose cabinet handle and shoring up a flat-pack drawer slide used a couple of M4 and M5 fasteners. Having metric on hand—especially washers to spread the load—saved a hardware store run.

• Automotive trim: For non-structural brackets and accessory mounts under the hood, the M6s with washers did the job. I wouldn’t use these where heat or vibration demands graded or locking hardware, but for a dash cam mount and a relay bracket, they held fast.

Drive engagement was consistent, and the heads didn’t chew up under moderate torque. A dab of threadlocker where vibration is expected is a good idea since you’re working with standard nuts rather than nyloc or serrated flange nuts.

Corrosion resistance: practical, not exotic

These are not marketed as stainless, and I treated them as plated steel with a corrosion-resistant finish. I left a few spares on a covered porch for several days of damp weather, and they came back clean with no visible rust. For indoor and light outdoor uses, that’s fine. For marine environments, exterior fixtures, or anywhere they’ll see regular moisture, I’d still choose true stainless hardware. But for general shop and household work, the finish here is more than adequate.

What it won’t do

• Replace structural or graded hardware: There are no strength markings, and this isn’t the place to source critical fasteners for load-bearing or safety-related repairs.
• Satisfy hex/Allen-head preferences: If you rely on socket head cap screws for clearance or torque, this round/pan head, cross-slot kit won’t replace your go-to.
• Cover very long lengths or very small diameters: No M2 hardware, and nothing longer than 40 mm in M5/M6. Plan accordingly for deep stackups or specialty projects.
• Survive rough transport without care: The organizer is fine on a shelf or gentle travel, but it’s still a plastic case with plastic hinges.

Who will get the most out of it

• Makers and 3D-printing tinkerers who live in the M3–M4 world.
• Homeowners and renters who want a catch-all for small repairs without multiple trips to the store.
• Electronics hobbyists mounting boards, fans, brackets, and panels.
• Light automotive and motorcycle accessory mounting—non-critical brackets, panels, and add-ons.

If you regularly build furniture, work in metal fabrication, or do field service out of a truck, you’ll still want dedicated assortments in stainless, graded, or hex drive. This kit is a complement, not a replacement, for specialized fasteners.

Value and small usability tips

As a single purchase that fills the “I need a metric screw right now” gap, the price-to-coverage ratio is strong. You’re buying breadth, organization, and convenience more than exotic metallurgy. A few habits make it punch above its weight:

• Use the right driver: PH1 for M3/M4, PH2 for M5/M6 to avoid cam-out.
• Pair with a tiny bottle of medium-strength threadlocker for vibration-prone assemblies.
• Keep a caliper or metric gauge in the box to quickly confirm lengths.
• Pre-stack washers/nuts for repeat tasks to speed up assembly.

Final recommendation

I recommend the wugongshan metric fastener kit for anyone who wants a reliable, well-organized stock of everyday M3–M6 hardware for general repairs, electronics, and maker projects. The thread quality, consistent head slots, and sensible size spread make it easy to use, and the corrosion-resistant finish holds up in typical indoor and light-duty scenarios. Its limitations are reasonable and clear: it’s not graded, it’s not stainless, and the organizer isn’t built for abuse. Within those bounds, it’s the kind of kit that saves time, keeps projects moving, and pays for itself the first time it prevents a hardware store run.