DIN6912 Thin Head Socket Cap Screws with Pilot Recess
DIN 6912 Thin Head Socket Cap Screws with Pilot Recess are designed for compact fastening applications where the available space above the joint is limited. Their reduced head height provides a lower-profile alternative to conventional socket head cap screws, while the internal hexagon socket allows the screw to be tightened with a hex key or suitable driver. The pilot recess beneath the head provides additional guidance and positioning where the mating component is designed to accommodate the screw, helping maintain a controlled and accurately located fastening point.
The combination of a thin cylindrical head, pilot recess, and internal hex drive makes DIN 6912 suitable for mechanical assemblies, machine components, tooling, fixtures, equipment covers, and other constructions where surrounding parts leave little clearance around the fastener. Screws can be selected in different materials, property classes, thread configurations, lengths, and surface finishes according to the load, corrosion conditions, and manufacturing requirements of the assembly. This allows the same low-profile fastening concept to be adapted to both general machinery and more demanding precision equipment.
Specification:
| Item | Specification |
|---|---|
| Standard | DIN6912 |
| Product Type | Thin Head Socket Cap Screw |
| Head Type | Thin Cylindrical Head |
| Drive | Internal Hexagon Socket |
| Pilot Fearture | Pilot Recess |
| Thread Diameter | M4-M36 |
| Material | Carbon Steel,Alloy Steel,Stainless Steel |
| Steel Property | ISO 898-1 |
| Stainless Steel Property | ISO 3506-1 |
| Surface Treatment | Bright Finish,Zinc Plated,Black Oxidation,Nylok Patch |
Dimension Chart of DIN6912 Screw:
| Mon | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 |
| P | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 |
| dk max | 7 | 8.5 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 40 | 45 | 50 | 54 |
| dk min | 6.78 | 8.28 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 32.61 | 35.61 | 39.61 | 44.61 | 49.61 | 53.54 |
| da max | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 24.4 | 26.4 | 30.4 | 33.4 | 36.4 | 39.4 |
| d1 min | 2 | 2.5 | 3 | 4 | 5 | 6 | 7 | 8 | 8 | 10 | 10 | 12 | 12 | 15 | 16.5 | 18 |
| d1 max | 2.06 | 2.56 | 3.06 | 4.075 | 5.075 | 6.075 | 7.09 | 8.09 | 8.09 | 10.09 | 10.09 | 12.11 | 12.11 | 15.11 | 16.61 | 18.11 |
| e min | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 13.72 | 16 | 16 | 19.44 | 19.44 | 21.73 | 21.73 | 25.15 | 27.43 | 30.85 |
| k max | 2.8 | 3.5 | 4 | 5 | 6.5 | 7.5 | 8.5 | 10 | 11 | 12 | 13 | 14 | 16 | 17.5 | 19.5 | 21.5 |
| k min | 2.66 | 3.32 | 3.82 | 4.82 | 6.28 | 7.28 | 8.28 | 9.78 | 10.73 | 11.73 | 12.73 | 13.73 | 15.73 | 17.23 | 19.17 | 21.17 |
| r min | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 | 1 | 1 | 1 | 1 |
| s min | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 12.032 | 14.032 | 14.032 | 17.05 | 17.05 | 19.065 | 19.065 | 22.065 | 24.065 | 27.065 |
| s max | 3.1 | 4.12 | 5.14 | 6.14 | 8.175 | 10.175 | 12.212 | 14.212 | 14.212 | 17.23 | 17.23 | 19.275 | 19.275 | 22.275 | 24.275 | 27.275 |
| t min | 1.48 | 1.88 | 2.38 | 2.88 | 3.35 | 3.85 | 4.35 | 5.35 | 5.85 | 6.32 | 6.82 | 6.82 | 8.32 | 8.82 | 9.82 | 11.28 |
| t max | 1.72 | 2.12 | 2.62 | 3.12 | 3.65 | 4.15 | 4.65 | 5.65 | 6.15 | 6.68 | 7.18 | 7.18 | 8.68 | 9.18 | 10.18 | 11.72 |
| t1 min | 3.3 | 4 | 5 | 6.5 | 7.5 | 9 | 10 | 11.5 | 12.5 | 14 | 15 | 16 | 17 | 19 | 20 | 24 |
| t1 max | 3.6 | 4.3 | 5.3 | 6.86 | 7.86 | 9.36 | 10.36 | 11.93 | 12.93 | 14.43 | 15.43 | 16.43 | 17.43 | 19.52 | 20.52 | 24.52 |
Mechanical Property:
DIN 6921 Carbon and Alloy Steel Bolts — ISO 898-1
DIN 6921 hex flange bolts made from carbon and alloy steel are available in different property classes, such as 8.8, 10.9 and 12.9, depending on the specified requirements. ISO 898-1 defines their mechanical properties, including tensile strength, yield strength, proof load and hardness. The appropriate property class depends on the required clamping force and application conditions.
DIN 6921 Stainless Steel Bolts — ISO 3506-1
DIN 6921 hex flange bolts made from stainless steel are available in different steel grades and property classes, including A2-70 and A4-70. ISO 3506-1 specifies their mechanical properties, including tensile strength and 0.2% proof stress. The selection of stainless steel grade depends on the required strength and corrosion resistance in the intended service environment.