







🔧 Screw it right, screw it tight — the pro’s choice for precision and power!
The BNUOK 120pcs M3 x 6mm Hex Socket Head Cap Screws are crafted from high-strength 12.9 grade alloy steel with a sleek black oxide finish for rust resistance. Featuring fully threaded shafts and a torque-optimized Allen hex socket drive, this set delivers precision and durability for demanding industrial, DIY, and tech projects. With 120 screws plus a hex spanner included, it’s the ultimate all-in-one fastener kit designed for professionals and makers who refuse to compromise on quality or performance.







































| ASIN | B0DJQH3WSX |
| Best Sellers Rank | #1,136 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Socket Head Screws |
| Brand | BNUOK |
| Color | Black |
| Compatible Groove Diameter | 3 Millimeters |
| Customer Reviews | 4.7 4.7 out of 5 stars (563) |
| Drive System | Internal Hex |
| Exterior Finish | Black Oxide |
| Fastener Size | M3 x 6mm |
| Fastener Type | Hex Socket Bolt |
| Finish Types | Matte |
| Head Type | Socket |
| Item Diameter | 3 Millimeters |
| Item Dimensions | 0.24 x 0.12 x 0.24 inches |
| Item Hardness | Grade 12.9 |
| Manufacturer | BNUOK |
| Manufacturer Grade | heavy-duty |
| Material Type | Alloy Steel |
| Metal Type | Alloy Steel |
| Model | BNH02010 |
| Number of Pieces | 120 |
| Part Number | BNH02010 |
| Screw Head Style | Hex |
| Set Screw Thread Type | Metric Coarse |
| Size Name | M3 x 6mm |
| Thread Class | 3A |
| Thread Coverage | Fully Threaded |
| Thread Size | m3-0.5 |
| Thread Style | Right Hand |
| Thread Type | Unc |
| Unit Count | 120.0 Count |
C**N
Strong, Precise, and Great Value
This screw set is excellent quality. The 12.9 grade alloy steel makes them very strong and reliable for heavy-duty applications, and the black oxide finish gives them a clean, professional look while helping to resist rust. The machining is precise—the threads are smooth, consistent, and seat firmly without stripping. I like that they come fully threaded, making them versatile for different projects, from 3D printer assemblies to furniture, robotics, and DIY builds. The Allen socket drive fits snugly with the included hex spanner and standard tools, which prevents rounding out. The 180-piece set is a great value, giving me plenty of screws for current and future projects without having to worry about running out. Everything comes neatly packaged, which keeps the hardware organized and easy to grab. Overall, these are durable, accurate, and dependable screws. Highly recommended for makers, builders, and anyone needing high-strength fasteners
D**C
decent quality
showed up quickly and were the correct spec. I've had a lot of trouble finding fasteners this size locally and these worked great.
G**O
Great product great price
Amazing screws very nice but long ones cut them to whatever length they needed worked out well very happy with it
M**E
As advised. Good product
As advised. Good to go.
J**T
Works great
Nice screws
C**)
BNUOK 280-Piece M5 12.9 Grade Alloy Steel Screw Assortment – Strong, Organized, Reliable Hardware
For anyone who works on machinery, 3D printers, automotive projects, or general shop builds, the BNUOK 280-piece M5 Screws Assortment Kit is a practical and worthwhile addition to the toolbox. The standout feature here is the 12.9 grade alloy steel construction. These bolts are rated for high strength, and in real-world use they feel solid and durable. They don’t strip easily under normal torque, and they hold up well in applications where lower-grade hardware would start to round out or deform. If you’re used to softer, generic fasteners, this kit is a noticeable upgrade. The assortment itself is well thought out. Having multiple lengths of M5 bolts in one organized case saves time and eliminates the need to run to the hardware store mid-project. The storage case keeps everything separated and easy to identify, which is especially helpful if you use M5 hardware frequently. Threading appears clean and consistent, with smooth engagement in compatible nuts and tapped holes. I didn’t encounter obvious burrs or defects in the pieces I used. For hobbyist and light industrial use, the quality is more than sufficient. The only limitation is that this is strictly an M5 kit. If your projects require a mix of metric sizes, you’ll still need additional assortments. Also, while the case is functional, it’s not ultra-heavy-duty—best suited for workshop storage rather than rough transport. Overall, this is a dependable, high-strength M5 bolt assortment that offers good variety and solid performance. If M5 is a common size in your projects, this kit delivers convenience and durability at a reasonable value.
L**E
Top Notch Quality
Very nice hardware, very nice indeed and as per what seems to be the only way I can order hardware is need 2 nnex 2 buy 22. I've quietly collected quite the assortment I've bought this way. Good stuff this
A**L
Sockethead
Good quality and value 💯
Trustpilot
2 weeks ago
1 month ago