24 Hole Metric Socket Cap Screw Assortment Grade 12.9
When you're bolting a die section into a press, connecting hydraulic manifold blocks, or fastening a tooling plate that will see repeated impact loads, Grade 12.9 socket cap screws are typically what the job calls for. This assortment covers M6, M8, M10, and M12 in alloy steel with black oxide finish, organized across a labeled 24-hole large metal drawer.
What's Included
- Grade 12.9 metric socket head cap screws — M6, M8, M10, and M12 diameters, multiple lengths per size
- 24-hole large metal drawer — QR-coded labeled, one compartment per size and length combination
Specifications
| Thread standard | Metric coarse |
| Grade | 12.9 — highest standard metric strength grade |
| Tensile strength | 1,220 MPa minimum |
| Drive | Hex socket (Allen/hex key) |
| Finish | Black oxide / alloy steel |
| Diameters | M6, M8, M10, M12 |
| Storage | 24-hole large metal drawer |
| SKU | ASST24MSCS#2 |
Best For
- Die and mold work — Grade 12.9 is the standard specification for die components, inserts, core pins, and press fixtures that must hold under impact and cyclic loading
- Machine tooling and jig plates — high preload in compact fasteners keeps precision tooling registered under repeated use
- Hydraulic manifolds and fluid power equipment — where high clamping force in a small fastener footprint is critical to joint integrity
- Precision equipment assembly — M6 through M12 covers the majority of metric socket cap screw applications in CNC machines, machining centers, and industrial equipment
- Tool and die shops — a ready stock of the four most common metric socket cap sizes at maximum available strength, organized for daily shop use
About Grade 12.9
Grade 12.9 is the highest standard metric fastener grade, with a minimum tensile strength of 1,220 MPa. To put that in context: Grade 8.8 (the common machinery grade) is rated at approximately 830 MPa, and Grade 10.9 at 1,040 MPa — Grade 12.9 exceeds both. The "12.9" marking encodes the material properties directly: 1,200 MPa minimum tensile strength, with a proof load ratio of 0.9, giving a proof load of 1,080 MPa.
Socket head cap screws at Grade 12.9 are made from alloy steel with black oxide finish, which provides light corrosion resistance and reduces galling in precision counterbores and tapped holes. The hex socket drive lets you work in recesses, cavities, and confined assemblies where a standard hex head wrench can't engage. For tooling, die work, and high-precision machinery, Grade 12.9 socket cap screws are typically the specified fastener — not an upgrade, but the baseline the job is designed around.
Shipping & Ordering
- Ships within 1–2 business days from our warehouse
- Volume pricing available — save up to 20% when ordering 3 or more kits
- B2B accounts: Fleet managers, facilities teams, and machine shops can apply for a business account with custom pricing and a dedicated rep — contact us to get started