Product Description ：
Socket Cup Point Grub Screws – 12.9 Carbon Steel, Fine Thread (M6–M12)
Secure, vibration-resistant fastening for your machinery, fixtures, and assemblies with these high-strength socket cup point grub screws. Featuring a cup (round) point that bites into the mating part and a socket (hex) head for torque with a hex key/Allen wrench, they deliver a tight, reliable joint without protruding heads .
✅ Key Features
- Grade / Strength: 12.9 — the highest common bolt grade, offering exceptional tensile and yield strength (≈1,220 MPa minimum proof load) for demanding applications .
- Material: High-carbon / alloy steel, heat-treated and quenched to 12.9 specifications .
- Point Style: Socket / Hex drive (internal hex) + Cup (round) point for positive grip in the tapped hole .
- Thread: Fine thread for better hole fill and resistance to loosening under vibration .
- Sizes: M6, M8, M10, M12 (and possibly M4/M5/M14+ — select your option; image shows M6–M12 range).
- Finish: Typically black oxide / salt-bath nitride (dark) for corrosion resistance and low glare — check option .
- Locking set screws, handle/knob retainers, and indexing/adjustment screws in machinery and tooling .
- fixtures, jigs, dies, and precision equipment where a flush, tamper-resistant fastener is needed .
- Automotive, motorsport, CNC, 3D printers, robotics, and high-vibration environments .
- Replacement of worn/loose original grub screws on existing assemblies
- Drill and tap the mating part to the correct coarse or fine metric thread (match screw thread type) to the required depth.
- Apply a thread-locking compound (e.g., Loctite) to the threads for extra vibration resistance (recommended for 12.9 grub screws under load).
- Seat the cup point firmly in the hole, then tighten with the correct hex key / Allen wrench to the specified torque (see engineering tables for 12.9 torque values) .
※ Please note: We specialise in the production of various hardware accessories, hardware tools and mechanical transmission system components. If you have any other needs, please contact me and we will solve your problem promptly!
▲ Tips:
◆ All pictures are professionally colour-coded, but due to the different ambient light and display device settings, there may be some discrepancies between the displayed pictures and the items themselves. Please understand this.
◆ The data is measured manually. There may be deviations, but this has no effect on use.
