DIN 7984 Low Head Socket Head Cap Screws Technical Datasheet
DIN 7984 Low Head Socket Head Cap Screws are metric threaded fasteners featuring a reduced cylindrical head with an internal hexagon (Allen) drive. Compared to standard DIN 912 / ISO 4762 socket head cap screws, DIN 7984 screws provide a significantly lower head height, making them ideal for installations where vertical clearance is limited.
Due to the reduced head dimensions, DIN 7984 screws have reduced loadability compared to standard socket head cap screws and should be selected only where the application permits lower preload and tightening torque. They are widely used in automation equipment, machine tools, robotics, electronics, medical devices, motors, linear guides, and compact mechanical assemblies
Table of Contents
ITEM CODE: 1038
Standards
| Standard | Equivalent Standards |
|---|---|
| DIN 7984 | No direct ISO equivalent |
Dimensions
| d1 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 |
| d2 | 5.5 | 7 | 8.5 | 10 | 13 | 16 | 18 | 24 |
| b | 12 | 14 | 16 | 18 | 22 | 26 | 30 | 38 |
| k | 2 | 2.8 | 3.5 | 4 | 5 | 6 | 7 | 9 |
| s | 2 | 2.5 | 3 | 4 | 5 | 7 | 8 | 12 |
| t | 1.5 | 2.3 | 2.7 | 3 | 3.8 | 4.5 | 5 | 5.5 |
all dimensions in mm
Dimensions Tolerances:
General dimensional tolerances for standard metric fasteners—including thread diameter, overall length, head diameter, head height/thickness, across flats, and washer dimensions—are available in our Standard Dimensional Tolerances for Common Metric Fasteners guide.
Certain product-specific features, such as drive recess dimensions, socket depth, countersink geometry, under-head radii, and other special characteristics, are governed by the applicable DIN or ISO product standard and may not included in this datasheet.
Download Technical Datasheets
Stainless Steel
| Grade | Download |
|---|---|
| A2-70 (SS304) | ⬇️ Download Datasheet |
| A4-70 (SS316) | ⬇️ Download Datasheet |
Mechanical Properties
| Material / Property Class | Tensile Strength | Yield Strength | Standard |
|---|---|---|---|
| Stainless Steel A2-70 | ≥ 700 MPa | ≥ 450 MPa | ISO 3506-1 |
| Stainless Steel A4-70 | ≥ 700 MPa | ≥ 450 MPa | ISO 3506-1 |
Material Characteristics and Recommended Applications
| Material | Characteristics | Typical Applications |
|---|---|---|
| Stainless Steel A2-70 | Good corrosion resistance | Food equipment, machinery, electronics |
| Stainless Steel A4-70 / A4-80 | Excellent corrosion resistance | Marine, offshore, chemical plants |
| Alloy Steel 8.8 | Medium strength | General industrial machinery |
| Alloy Steel 10.9 | High strength | Machine tools, automation |
| Alloy Steel 12.9 | Very high strength | Precision machinery, moulds, robotics |
| Titanium Grade 5 | High strength with low weight | Aerospace, racing, medical devices |
Technical Specifications
| Property | Specification |
|---|---|
| Standard | DIN 7984 |
| Head Type | Low Cylindrical Head |
| Drive | Internal Hexagon (Allen) |
| Thread Type | Metric Coarse |
| Thread Direction | Right Hand |
| Thread Tolerance | 6g |
| Product Grade | A |
| Size Range | M3 – M24 |
| Length Range | 4 mm – 150 mm (depending on diameter) |
| Finish Options | Plain, Passivated, Black Oxide, Zinc Plated, Geomet, Dacromet |
| Mechanical Standards | ISO 898-1 |
| Stainless Standard | ISO 3506 |
| RoHS Available | Yes |
| REACH Compliant | Available |
DIN 7984 Low Head Socket Head Cap Screws Weight Chart
Weight in kgs. per 1,000 pcs. All weights are approximations.
| Length (mm) | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | 0.48 | ||||||||||||
| 6 | 0.52 | 0.96 | |||||||||||
| 8 | 0.60 | 1.12 | 2.26 | ||||||||||
| 10 | 0.69 | 1.28 | 2.50 | 3.59 | |||||||||
| 12 | 0.78 | 1.44 | 2.74 | 3.94 | 8.05 | ||||||||
| 14 | 0.86 | 1.60 | 2.98 | 4.29 | 8.65 | ||||||||
| 16 | 0.97 | 1.76 | 3.22 | 4.64 | 9.25 | 14.4 | |||||||
| 18 | 1.10 | 1.95 | 3.46 | 4.99 | 9.85 | 15.4 | |||||||
| 20 | 1.20 | 2.15 | 3.77 | 5.34 | 10.5 | 16.4 | 24.1 | ||||||
| 25 | 2.64 | 4.54 | 6.45 | 12 | 19 | 27.7 | |||||||
| 30 | 5.31 | 7.56 | 14 | 21.6 | 31.3 | 46.5 | 62.1 | ||||||
| 35 | 8.67 | 16 | 24.7 | 34.9 | 51.4 | 68.8 | |||||||
| 40 | 9.78 | 18 | 27.8 | 39.3 | 56.3 | 75.5 | 99 | 130 | |||||
| 45 | 20 | 30.9 | 43.7 | 62.3 | 82.2 | 107 | 140 | ||||||
| 50 | 22 | 34 | 48.1 | 68.3 | 89.6 | 115 | 150 | 188 | 223 | ||||
| 55 | 24 | 37.1 | 52.5 | 74.3 | 97 | 125 | 160 | 201 | 238 | ||||
| 60 | 26 | 40.2 | 56.9 | 80.3 | 104 | 135 | 172 | 214 | 253 | ||||
| 70 | 46.4 | 65.8 | 92.4 | 119 | 155 | 197 | 244 | 288 | |||||
| 80 | 74.7 | 105 | 134 | 175 | 222 | 274 | 324 | ||||||
| 90 | 195 | 247 | 304 | 359 | |||||||||
| 100 | 215 | 272 | 334 | 395 |
Applications
- Machine tools
- Robotics
- Automation systems
- Linear guide assemblies
- Servo motors
- Electric motors
- Gearboxes
- Medical equipment
- Semiconductor equipment
- Packaging machinery
- Electronics enclosures
- Hydraulic equipment
- Pneumatic systems
- Aerospace interiors
- Automotive assemblies
- Industrial fixtures
Advantages
- Low head height for restricted installation spaces
- Suitable where standard socket head screws cannot fit
- Internal hex drive allows high installation torque for its size
- Clean cylindrical head appearance
- Suitable for precision machinery
- Available in stainless steel and alloy steel
- Metric thread compatibility
- Good vibration resistance when used with suitable locking systems
- Suitable for automation equipment
- Excellent replacement where clearance is limited
Engineering Note: Because of the reduced head height, DIN 7984 screws have lower load-bearing capacity than standard DIN 912 / ISO 4762 socket head cap screws. They should not be substituted in highly loaded joints without engineering verification.
Frequently Asked Questions
What is DIN 7984?
DIN 7984 specifies hexagon socket head cap screws with a reduced cylindrical head for applications where installation height is limited.
How is DIN 7984 different from DIN 912?
DIN 7984 has a lower head height and smaller hex socket than DIN 912, allowing installation in confined spaces but with reduced loadability.
Are DIN 7984 screws fully threaded?
Smaller sizes are generally fully threaded. Larger diameters may be supplied either fully or partially threaded depending on the manufacturer and screw length.
Are DIN 7984 screws as strong as DIN 912 screws?
No. Due to the reduced head geometry, DIN 7984 screws are intended for reduced loading compared with standard socket head cap screws
What materials are commonly available?
Stainless Steel A2 (304)
Stainless Steel A4 (316)
Alloy Steel 8.8
Alloy Steel 10.9
Alloy Steel 12.9
Titanium (special order)
What industries commonly use DIN 7984 screws?
They are widely used in automation, machine tools, robotics, medical equipment, electronics, precision machinery, and compact mechanical assemblies.
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