Socket head cap screws
DIN 912 – Hexagon socket head cap screws
Dimensions, materials and applications – with the ISO counterpart ISO 4762.
Spreek Terry · Sales Engineer
About the standard
DIN 912 is the German standard for hexagon socket head cap screws: a cylindrical head with an internal hexagon drive, in metric coarse thread. The compact head needs little space around the bolt, so DIN 912 screws are the standard choice in machine building, tooling, fixtures and anywhere a bolt sits in a counterbore.
DIN 912 has been withdrawn and replaced by ISO 4762 (published in Germany as DIN EN ISO 4762). Head diameter, head height and socket size are the same in both, so a DIN 912 and an ISO 4762 screw of the same size fit the same counterbore and the same hex key. The differences lie in the range of sizes and lengths covered. The fine-thread version is ISO 12474. In practice, both designations are used side by side; our datasheet shows the dimensions to DIN 912 / ISO 4762.
We supply DIN 912 screws in steel 8.8, 10.9 and 12.9 and in stainless A2 and A4, from M1.6 to M24 in the configurator. Each delivery comes with an EN 10204 3.1 certificate.
Applications
- Machine frames, tooling and fixtures where the head sits in a counterbore
- Cleanroom and vacuum equipment in A2 or A4 with EPK treatment
- Pump, valve and compressor assemblies
- Process equipment in stainless A4-80 where chlorides are present
- Heat exchanger and skid assemblies in 10.9 or 12.9
Nederlands: inbusbouten DIN 912, cilinderkopschroeven met binnenzeskant, inbusbout 12.9, RVS inbusbouten A2 / A4.
Afmetingen
Main dimensions in mm.
The full table with all sizes and lengths is in the datasheet.
Dimensions in mm
| Thread d | M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | M64 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | – | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 |
| b | – | 15 | 16 | 17 | 18 | 20 | 22 | 24 | 28 | 32 | 36 | 40 | 44 | 52 | 60 | 72 | 84 | 96 | 108 | 124 | 140 |
| dk | max. | 3 | 3.8 | 4.5 | 5.5 | 7 | 8.5 | 10 | 13 | 16 | 18 | 21 | 24 | 30 | 36 | 45 | 54 | 63 | 72 | 84 | 96 |
| max., "grooved head" | 3.14 | 3.98 | 4.68 | 5.68 | 7.22 | 8.72 | 10.22 | 13.27 | 16.27 | 18.27 | 21.33 | 24.33 | 30.33 | 36.39 | 45.39 | 54.46 | 63.46 | 72.46 | 84.54 | 96.54 | |
| min. | 2.86 | 3.62 | 4.32 | 5.32 | 6.78 | 8.28 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 29.67 | 35.61 | 44.61 | 53.54 | 62.54 | 71.54 | 83.46 | 95.46 | |
| da | max. | 2 | 2.6 | 3.1 | 3.6 | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 22.4 | 26.4 | 33.4 | 39.4 | 45.6 | 52.6 | 63 | 71 |
| ds | max. | 1.6 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 | 30 | 36 | 42 | 48 | 56 | 64 |
| min. | 1.46 | 1.86 | 2.36 | 2.86 | 3.82 | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | 19.67 | 23.67 | 29.67 | 35.61 | 41.61 | 47.61 | 55.54 | 63.54 | |
| e | min. | 1.73 | 1.73 | 2.30 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 13.72 | 16.00 | 19.44 | 21.73 | 25.15 | 30.85 | 36.57 | 41.13 | 46.83 | 52.53 |
| h | max. | 0.34 | 0.51 | 0.51 | 0.51 | 0.6 | 0.6 | 0.68 | 1.02 | 1.02 | 1.45 | 1.45 | 1.45 | 2.04 | 2.04 | 2.89 | 2.89 | 3.06 | 3.91 | 5.95 | 5.95 |
| k | max. | 1.6 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 | 30 | 36 | 42 | 48 | 56 | 64 |
| min. | 1.46 | 1.86 | 2.36 | 2.86 | 3.82 | 4.82 | 5.7 | 7.64 | 9.64 | 11.57 | 13.57 | 15.57 | 19.48 | 23.48 | 29.48 | 35.38 | 41.38 | 47.38 | 55.26 | 63.26 | |
| r | min. | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 1 | 1 | 1.2 | 1.6 | 2 | 2 |
| s | nominal | 1.5 | 1.5 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 17 | 19 | 22 | 27 | 32 | 36 | 41 | 46 |
| max. | 1.58 | 1.58 | 2.08 | 2.58 | 3.08 | 4.095 | 5.14 | 6.14 | 8.175 | 10.175 | 12.212 | 14.212 | 17.23 | 19.275 | 22.275 | 27.275 | 32.33 | 36.33 | 41.33 | 46.33 | |
| min. | 1.52 | 1.52 | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 12.032 | 14.032 | 17.05 | 19.065 | 22.065 | 27.065 | 32.08 | 36.08 | 41.08 | 46.08 | |
| t | min. | 0.7 | 1 | 1.1 | 1.3 | 2 | 2.5 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 15.5 | 19 | 24 | 28 | 34 | 38 |
| v | max. | 0.16 | 0.2 | 0.25 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.4 | 3 | 3.6 | 4.2 | 4.8 | 5.6 | 6.4 |
| dw | min. | 2.72 | 3.48 | 4.18 | 5.07 | 6.53 | 8.03 | 9.38 | 12.33 | 15.33 | 17.23 | 20.17 | 23.17 | 28.87 | 34.81 | 43.61 | 52.54 | 61.34 | 70.34 | 82.26 | 94.26 |
| w | min. | 0.55 | 0.55 | 0.85 | 1.15 | 1.4 | 1.9 | 2.3 | 3.3 | 4 | 4.8 | 5.8 | 6.8 | 8.6 | 10.4 | 13.1 | 15.3 | 16.3 | 17.5 | 19 | 22 |
Show all 3 tables ↓Show fewer tables ↑
Shank length ls min. and grip length lg max., in mm
| Length l | M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nom. | min. | max. | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg |
| 2.5 | 2.3 | 2.7 | Fully threaded | |||||||||||||||||||
| 3 | 2.8 | 3.2 | Fully threaded | |||||||||||||||||||
| 4 | 3.76 | 4.24 | Fully threaded | |||||||||||||||||||
| 5 | 4.76 | 5.24 | Fully threaded | |||||||||||||||||||
| 6 | 5.76 | 6.24 | Fully threaded | |||||||||||||||||||
| 8 | 7.71 | 8.29 | Fully threaded | |||||||||||||||||||
| 10 | 9.71 | 10.29 | Fully threaded | |||||||||||||||||||
| 12 | 11.65 | 12.35 | Fully threaded | |||||||||||||||||||
| 16 | 15.65 | 16.35 | Fully threaded | |||||||||||||||||||
| 20 | 19.58 | 20.42 | – | – | 2 | 4 | full | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| 25 | 24.58 | 25.42 | – | – | – | – | 5.75 | 8 | 4.5 | 7 | full | – | – | – | – | – | – | – | – | – | – | |
| 30 | 29.58 | 30.42 | – | – | – | – | – | – | 9.5 | 12 | 6.5 | 10 | 4 | 8 | full | – | – | – | – | – | – | |
| 35 | 34.5 | 35.5 | – | – | – | – | – | – | – | – | 11.5 | 15 | 9 | 13 | 6 | 11 | full | – | – | – | – | |
| 40 | 39.5 | 40.5 | – | – | – | – | – | – | – | – | 16.5 | 20 | 14 | 18 | 11 | 16 | 5.75 | 12 | full | – | – | |
| 45 | 44.5 | 45.5 | – | – | – | – | – | – | – | – | – | – | 19 | 23 | 16 | 21 | 10.75 | 17 | 5.5 | 13 | full | |
| 50 | 49.5 | 50.5 | – | – | – | – | – | – | – | – | – | – | 24 | 28 | 21 | 26 | 15.75 | 22 | 10.5 | 18 | – | – |
| 55 | 54.4 | 55.6 | – | – | – | – | – | – | – | – | – | – | – | – | 26 | 31 | 20.75 | 27 | 15.5 | 23 | 10.25 | 19 |
| 60 | 59.4 | 60.6 | – | – | – | – | – | – | – | – | – | – | – | – | 31 | 36 | 25.75 | 32 | 20.5 | 28 | 15.25 | 24 |
| 65 | 64.4 | 65.6 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 30.75 | 37 | 25.5 | 33 | 20.25 | 29 |
| 70 | 69.4 | 70.6 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 35.75 | 42 | 30.5 | 38 | 25.25 | 34 |
| 80 | 79.4 | 80.6 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 45.75 | 52 | 40.5 | 48 | 35.25 | 44 |
| 90 | 89.3 | 90.7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 50.5 | 58 | 45.25 | 54 |
| 100 | 99.3 | 100.7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 60.5 | 68 | 55.25 | 64 |
| 110 | 109.3 | 110.7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 65.25 | 74 |
| 120 | 119.3 | 120.7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 75.25 | 84 |
Shank length ls min. and grip length lg max., in mm
| Length l | M14 | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | M64 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| nom. | min. | max. | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg | ls | lg |
| 20 | 19.58 | 20.42 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 25 | 24.58 | 25.42 | full | full | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 30 | 29.58 | 30.42 | full | full | full | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||
| 35 | 34.5 | 35.5 | full | full | full | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||
| 40 | 39.5 | 40.5 | full | full | full | full | – | – | – | – | – | – | – | – | – | – | – | – | ||||
| 45 | 44.5 | 45.5 | full | full | full | full | full | – | – | – | – | – | – | – | – | – | – | |||||
| 50 | 49.5 | 50.5 | full | full | full | full | full | – | – | – | – | – | – | – | – | – | – | |||||
| 55 | 54.4 | 55.6 | full | full | full | full | full | full | – | – | – | – | – | – | – | – | ||||||
| 60 | 59.4 | 60.6 | 10 | 20 | full | full | full | full | full | full | – | – | – | – | – | – | ||||||
| 65 | 64.4 | 65.6 | 15 | 25 | 11 | 21 | full | full | full | full | full | – | – | – | – | – | – | |||||
| 70 | 69.4 | 70.6 | 20 | 30 | 16 | 26 | full | full | full | full | full | full | – | – | – | – | ||||||
| 80 | 79.4 | 80.6 | 30 | 40 | 26 | 36 | 15.5 | 28 | full | full | full | full | full | full | – | – | ||||||
| 90 | 89.3 | 90.7 | 40 | 50 | 36 | 46 | 25.5 | 38 | 15 | 30 | full | full | full | full | full | full | ||||||
| 100 | 99.3 | 100.7 | 50 | 60 | 46 | 56 | 35.5 | 48 | 25 | 40 | full | full | full | full | full | full | ||||||
| 110 | 109.3 | 110.7 | 60 | 70 | 56 | 66 | 45.5 | 58 | 35 | 50 | 20.5 | 38 | full | full | full | full | full | |||||
| 120 | 119.3 | 120.7 | 70 | 80 | 66 | 76 | 55.5 | 68 | 45 | 60 | 30.5 | 48 | 16 | 36 | full | full | full | full | ||||
| 130 | 129.2 | 130.8 | 80 | 90 | 76 | 86 | 65.5 | 78 | 55 | 70 | 40.5 | 58 | 26 | 46 | full | full | full | full | ||||
| 140 | 139.2 | 140.8 | 90 | 100 | 86 | 96 | 75.5 | 88 | 65 | 80 | 50.5 | 68 | 36 | 56 | 21.5 | 44 | full | full | full | |||
| 150 | 149.2 | 150.8 | – | – | 96 | 106 | 85.5 | 98 | 75 | 90 | 60.5 | 78 | 46 | 66 | 31.5 | 54 | full | full | full | |||
| 160 | 159.2 | 160.8 | – | – | 106 | 116 | 95.5 | 108 | 85 | 100 | 70.5 | 88 | 56 | 76 | 41.5 | 64 | 27 | 52 | full | full | ||
| 180 | 179.2 | 180.8 | – | – | – | – | 115.5 | 128 | 105 | 120 | 90.5 | 108 | 76 | 96 | 61.5 | 84 | 47 | 72 | 28.5 | 56 | full | |
| 200 | 199.08 | 200.93 | – | – | – | – | 135.5 | 148 | 125 | 140 | 110.5 | 128 | 96 | 116 | 81.5 | 104 | 67 | 92 | 48.5 | 76 | 30 | 60 |
| 220 | 219.08 | 220.93 | – | – | – | – | – | – | – | – | – | – | – | – | 101.5 | 124 | 87 | 112 | 68.5 | 96 | 50 | 80 |
| 240 | 239.08 | 240.93 | – | – | – | – | – | – | – | – | – | – | – | – | 121.5 | 144 | 107 | 132 | 88.5 | 116 | 70 | 100 |
| 260 | 258.95 | 261.05 | – | – | – | – | – | – | – | – | – | – | – | – | 141.5 | 164 | 127 | 152 | 108.5 | 136 | 90 | 120 |
| 280 | 278.95 | 281.05 | – | – | – | – | – | – | – | – | – | – | – | – | 161.5 | 184 | 147 | 172 | 128.5 | 156 | 110 | 140 |
| 300 | 298.95 | 301.05 | – | – | – | – | – | – | – | – | – | – | – | – | 181.5 | 204 | 167 | 192 | 148.5 | 176 | 130 | 160 |
- d
- Nominal thread diameter
- P
- Thread pitch, coarse
- b
- Thread length (reference)
- dk
- Head diameter
- da
- Transition diameter
- ds
- Body diameter
- k
- Head height
- r
- Fillet radius
- s
- Socket size
- e
- Socket across corners
- t
- Depth of driving feature
- v
- Chamfer or radius, max.
- w
- Thickness between socket and bearing face
- dw
- Bearing face diameter
Shank and grip lengths per length on pages 2 and 3. Grades and finishes: hbsfasteners.nl/products/socket-screws.
FAQ
Questions about DIN 912.
- Can DIN 912 screws be supplied with an EN 10204 3.1 or 3.2 certificate?
- Yes. We supply DIN 912 / ISO 4762 screws with an EN 10204 3.1 inspection certificate as standard. A 3.2 certificate, with a third-party inspector, is available on request – mention it with your enquiry so we can plan the inspection.
- Are DIN 912 screws available for cleanroom use?
- Yes, in A2 and A4 from M1.6 to M12. We supply them EPK-treated: electropolished, Kolsterised, cleaned to Grade 2 or 4 and vacuum-packed per 5, 10, 25, 50 or 100 pieces, each pack with a cleanliness certificate.
- What is DIN 912?
- DIN 912 is the standard for hexagon socket head cap screws (DIN 912 · ISO 4762). HBS Solutions supplies DIN 912 socket head cap screws from stock, with EN 10204 3.1 / 3.2 certificates.
- Which sizes does DIN 912 cover?
- The HBS datasheet lists DIN 912 from M1.6 to M64. The full dimension tables are on this page and in the free PDF datasheet.
- Which related standard corresponds to DIN 912?
- DIN 912 · ISO 4762.
- How do I order DIN 912 socket head cap screws?
- Configure the part online or send your parts list through the quote form; HBS Solutions replies with a quotation within 24 hours. Stock items ship from 500.000+ pieces in stock in Almere, the Netherlands.
Related standards
Often ordered together.
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