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🔧 Screw it right, screw it tight—join the pros with Kadrick’s ultimate M4 kit!
The Kadrick 1580PCS M4 Hex Socket Cap Head & Button Head Screws and Nuts Kit offers a comprehensive assortment of high-strength Grade 10.9 and 12.9 alloy steel fasteners in multiple lengths (6-40mm). Packaged in a sturdy, organized storage box, this kit is engineered for precision and durability, ideal for 3D printing, industrial, and DIY projects. Backed by a 24-month warranty and trusted by professionals, it’s the go-to solution for reliable, versatile fastening.

| ASIN | B0CQNPWSG4 |
| Best Sellers Rank | #1,747 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Screw & Bolt Assortment Sets |
| Brand | Kadrick |
| Color | Black |
| Compatible Groove Diameter | 4 millimeters |
| Customer Reviews | 4.5 out of 5 stars 115 Reviews |
| Fastener Type | Hex Socket Head |
| Finish Types | Black Oxide |
| Grade Rating | Grade 10.9 12.9 |
| Item Diameter | 4 millimeters |
| Item Dimensions | 7.7 x 5.5 x 1.5 inches |
| Item Highlight | M4-0.7*4/6/8/12/16/20/25/30/40 mm Bolts,Nuts and Washers Assortment Kit, 12.9 & 10.9 Grade Black Screws for 3D Printer |
| Item Shape | Hexagonal |
| Item dimensions L x W x H | 7.7 x 5.5 x 1.5 inches |
| Manufacturer | Kadrick |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Maximum Shear Strength | 1040 MPa |
| Model | Metric Screws M4x4mm-40mm |
| Number Of Items | 1 |
| Number of Pieces | 1580 |
| Outside Diameter | 4 millimeters |
| Part Number | 049-B&C-M2-M5-2000 |
| Screw Head Style | Socket Cap |
| Set Name | Kadrick M4 Screws, Nuts & Washers Assortment (1400 Pcs) |
| Size | M4 1580Pcs 6-40mm |
| Size Name | M4 1580Pcs 6-40mm |
| Thread Size | M4 x 0.7 |
| Unit Count | 1580 Count |
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