Metric hex socket screws
Metric hex socket cap head screws, also known as Allen head screws or hex drive cap screws, feature a hexagonal recess for secure, precise fastening across many applications. Their cylindrical head and internal hex drive make them ideal for tight spaces, offering a low-profile alternative to conventional bolts. Built to meet DIN 912, ISO 4762 standards, these screws deliver reliable performance in demanding settings.
Surface treatment:
TUZ’s metric hex socket screws deliver a strong, precise hold in demanding applications. With various threading styles, material grades, and protective finishes available, these screws meet the rigorous needs of industries requiring reliability and performance.
Key Features
Stable Torque Transfer
The hexagonal recess allows even torque transfer to the screw, distributing force across the hex socket walls. This design reduces the risk of slippage or stripping, ensuring a secure, precise fit and allowing for optimal fastening without damaging the screw head.
- Versatile Threading Options
Available in both fully and partially threaded styles, allowing selection of the appropriate thread type for secure grip and balanced load distribution.
Durable Construction for Heavy Loads
Manufactured from SCM435 alloy steel with a tensile strength of 120-140 kg/mm² and a hardness rating of HRC 39-44, these screws withstand high loads and provide lasting durability.
Corrosion-Resistant Finishes
Protected by black oxide, trivalent zinc, and nickel plating, these screws are resistant to rust and corrosion, extending their service life in challenging conditions.
Standards Compliance & Quality Control
Compliant with DIN 912, ISO 4762 standards, each screw undergoes rigorous quality control, including salt spray, hardness, and tensile load testing. Comprehensive PPAP reports are available for added assurance.
Extensive Sizing & Packaging Options
Available in M2 to M24 sizes and lengths up to 300mm, these screws can be ordered in bulk, small boxes, or custom packaging to suit various project requirements.
Applications
TUZ metric hex socket screws excel across many industries:
Industrial Machinery
Secures components in high-stress, vibration-prone environments.
Automotive Assemblies
Provides stability for essential parts such as engine mounts and suspension systems.
Bicycles & Sporting Equipment
Offers reliable support in high-stress areas under dynamic loads.
Home Appliances & Electronics
Ideal for compact, secure fastening in assemblies where space and durability are critical.
Choose TUZ’s metric hex socket cap head screws for reliable, precision fastening across critical applications. Built to DIN 912, ISO 4762 standards, they offer durability and stability in demanding environments. Contact us for more information or to place an order.
SPECIFICATIONS
- Product Names: Metric hexagon socket head screws, alloy steel hexagon socket head screws, hexagon socket head screws with heads, nickel-plated hexagon socket screws, galvanized hexagon socket head screws, white iron hexagon socket head screws, stainless steel hexagon socket head screws
- Standards Compliance: DIN 912-1983 / ISO 4762-1997
- Material Options: Alloy steel SCM435, stainless steel 304
- Strength Grades: 12.9, 10.9, 8.8
- Tensile Strength: 120 - 140 kg/mm² (approx. 1177-1372 MPa)
- Hardness: HRC 39 – 44
- Surface Treatments: Black oxide, trivalent zinc plating, trivalent black zinc plating, hot-dip galvanizing, bright nickel plating, black nickel plating, phosphate coating, chrome plating, Dacromet coating, Geomet coating, anti-loosening finishes
- Thread Tolerance Class: 5g6g
- Quality Control: Salt Spray Test, Hardness Test, Tensile Test, and PPAP Report available upon request
- Packing: Bulk, Small Box, Customized Options
Unit：mm
| Thread Size(d) | Thread Pitch | D | A | H | V | J | E | T | R | Da | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Size Max. | Min | Nominal Size Max. | Min | Nominal Size Max. | Tolerance Min. | Approx | Nominal Size | Tolerance | Approx | Min. | Min. | Max. | ||
| M3 | 0.5 | 3 | 2.86 | 5.5 | 5.32 | 3 | 2.86 | 0.3 | 2.5 | +0.080 +0.020 | 2.87 | 1.3 | 0.10 | 3.6 |
| M4 | 0.7 | 4 | 3.82 | 7.0 | 6.78 | 4 | 3.82 | 0.4 | 3.0 | +0.080 +0.020 | 3.44 | 2.0 | 0.20 | 4.7 |
| M5 | 0.8 | 5 | 4.82 | 8.5 | 8.28 | 5 | 4.82 | 0.5 | 4.0 | +0.095 +0.020 | 4.58 | 2.5 | 0.20 | 5.7 |
| M6 | 1.0 | 6 | 5.82 | 10.0 | 9.78 | 6 | 5.70 | 0.6 | 5.0 | +0.140 +0.020 | 5.72 | 3.0 | 0.25 | 6.8 |
| M8 | 1.25 | 8 | 7.78 | 13.0 | 12.73 | 8 | 7.64 | 0.8 | 6.0 | +0.140 +0.020 | 6.86 | 4.0 | 0.40 | 9.2 |
| M10 | 1.5 | 10 | 9.78 | 16.0 | 15.73 | 10 | 9.64 | 1.0 | 8.0 | +0.175 +0.025 | 9.15 | 5.0 | 0.40 | 11.2 |
| M12 | 1.75 | 12 | 11.73 | 18.0 | 17.73 | 12 | 11.57 | 1.2 | 10.0 | +0.175 +0.025 | 11.43 | 6.0 | 0.60 | 13.7 |
| M14 | 2.0 | 14 | 13.73 | 21.0 | 20.67 | 14 | 13.57 | 1.4 | 12.0 | +0.212 +0.032 | 13.72 | 7.0 | 0.60 | 15.7 |
| M16 | 2.0 | 16 | 15.73 | 24.0 | 23.67 | 16 | 15.57 | 1.6 | 14.0 | +0.212 +0.032 | 16.00 | 8.0 | 0.60 | 17.7 |
| M18 | 2.5 | 18 | 17.73 | 27.0 | 26.67 | 18 | 17.57 | 1.8 | 14.0 | +0.212 +0.032 | 16.00 | 9.0 | 0.60 | 20.2 |
| M20 | 2.5 | 20 | 19.67 | 30.0 | 29.67 | 20 | 19.48 | 2.0 | 17.0 | +0.230 +0.050 | 19.44 | 10.0 | 0.80 | 22.4 |
| M22 | 2.5 | twenty two | 21.67 | 33.0 | 32.61 | twenty two | 21.48 | 2.2 | 17.0 | +0.230 +0.050 | 19.44 | 11.0 | 0.80 | 24.4 |
| M24 | 3.0 | twenty four | 23.67 | 36.0 | 35.61 | twenty four | 23.48 | 2.4 | 19.0 | +0.275 +0.065 | 21.73 | 12.0 | 0.80 | 26.4 |