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This 1274-piece hex socket bolt and nut set features high-grade 12.9 carbon steel construction for exceptional strength and corrosion resistance. Designed with precision threading and a balanced hex head, it delivers maximum torque without slipping or deformation. The comprehensive kit includes multiple sizes (M2-M5), nuts, washers, and hex wrenches, all neatly organized in a compact case—perfect for professional repairs, DIY projects, and mechanical assembly. Engineered for durability and ease of use, it’s the essential fastener set that elevates your craftsmanship and efficiency.







| ASIN | B0DCVDPGBS |
| Best Sellers Rank | 6,012 in DIY & Tools ( See Top 100 in DIY & Tools ) 15 in Nut & Bolt Sets |
| Brand | YOUYIDUN |
| Brand Name | YOUYIDUN |
| Colour | Brown |
| Compatible Groove Diameter | 3 Millimeters |
| Country Of Origin | China |
| Customer Reviews | 4.5 out of 5 stars 1,172 Reviews |
| Fastener Type | Socket Head |
| Fastener type | Socket Head |
| Finish Types | Zinc |
| Item Diameter | 2 Millimetres |
| Item Dimensions | 20 x 15 x 3.7 centimetres |
| Item Shape | Hexagonal |
| Item Weight | 887 Grams |
| Item dimensions L x W x H | 20 x 15 x 3.7 centimetres |
| Manufacturer | YOUYIDUN |
| Manufacturer Part Number | 1 |
| Material | Carbon Steel |
| Material Type | Carbon Steel |
| Model Number | 1 |
| Number Of Items | 1 |
| Number of Pieces | 1274 |
| Screw Head Style | Hex |
| Set Name | 1274 Pcs 12.9 Carbon Steel Bolts and Nuts Set |
| Size | M2/M3/M4/M5-1270 |
| Thread Size | M2-M5 |
| Unit Count | 887.0 gram |
R**N
Great value kit, everything you need and well organised too
Really handy set to have around. I've been using it for bike maintenance and general DIY and it's been great so far. Loads of variety in the kit so I've always found the size I needed without having to order anything extra. Quality is good, the threading is clean and the black finish looks smart. The storage case keeps everything tidy and easy to find too. Good value for the quantity you get, would definitely recommend.
C**S
Changed my life
A selection of bolts, nuts, and washers—people underestimate this completely. But I’m going to tell you straight: this is foundational engineering. Nothing gets built without it. Nothing. Best overall First of all—organisation. A proper assortment like this changes everything. Instead of stopping mid-job, searching for the right M-size bolt, you just reach in and it’s there. M-whatever you need, it’s ready. That alone saves time, frustration, and frankly, sanity. The quality matters more than people think. Good steel means proper torque, no rounding off, no snapping under load. Cheap fasteners fail at exactly the wrong moment. These don’t give you that anxiety. They feel dependable. You tighten them, and you trust them. That’s important. Then the washers—very underrated component. Flat washers distribute load, protect surfaces. Spring washers add resistance, keep tension where it belongs. It’s not just filler—it’s control. It’s stability. It’s what keeps assemblies from loosening over time. And the nuts—simple, but critical. Thread engagement, smooth running, no binding. When they’re made well, everything just goes together cleanly. No fighting it. No cross-threading disasters. Just smooth assembly. This kind of kit also changes how you work. Suddenly you’re not improvising with mismatched hardware or making compromises. You build properly. Cleanly. Professionally. Even small repairs feel like proper engineering work. Overall: extremely practical, extremely useful, and quietly essential. Not glamorous at all—but absolutely fundamental. One of those kits that, once you have it, you wonder how you ever worked without it. A real backbone product.
T**N
Handy Bolt Set with Minor Packaging Issue
I buy a lot of these assorted nut and bolt sets, and this M4 405-piece kit is pretty good overall. The bolts, nuts, and washers are well machined and consistent, which is exactly what you want for general workshop use or hobby projects. The included case is compact and clearly labelled, which makes it easy to find what you need quickly. The only slight issue was that a few of the plastic dividers had come loose during shipping, so some of the compartments had mixed contents when it arrived. It was easy enough to sort out, but worth knowing in case you are expecting it to be ready to use straight out of the box. Still, for the price and the quantity, it is a solid purchase and a useful addition to any toolkit.
P**W
Economy M4 bolts
Bought these for use with bicycles. They are economical and the qualms adequate. Hex head is fine and works with all my tools. Huge selection of lengths and will keep me going forever. They don’t have the finish of a more expensive bolt but do the job.
M**S
Good quality bolts
Good quality assortment of bolts, the price is good and the quality of the threads and the socket are great.
P**O
Good value, wide range of sizes for a variety of projects
Perfect for my 3D print projects, the M3 is my goto size for most projects and the variety and volume of nuts and bolts will keep me going for a while. They are good value too.
L**S
Bolts
Love these. Great to have for small projects.
A**R
Useful but oily
Useful when you need them. But each screw and bolt is covered in an oily residue, which makes them hard to separate, hold and leaves marks on the item your using it on if not careful
A**E
nickel
ok bon produit , parfait
A**.
caixa de parafusos
caixa bem completa , bom preço e qualidade
P**R
245 st M3 M4-träskruvar
fungerar utmärkt inget att klaga på
C**I
Perfetto
Perfetto. C'è tutto, anche la brugola. Non si sa mai
J**V
Pratique pour le modélisme
Très pratique pour le modélisme et les petits travaux de précision. Ce lot contient un grand nombre de vis, écrous et rondelles de différentes tailles, ce qui permet d'avoir toujours la bonne fixation sous la main. La qualité est correcte pour ce type d'utilisation et le conditionnement est bien pensé pour organiser facilement les petites pièces. Un ensemble très utile pour les projets nécessitant des fixations M3, que ce soit en modélisme, bricolage de précision ou fabrication maison.
Trustpilot
3 weeks ago
1 month ago