DIN 7991 Hexagon Socket Countersunk Head Cap Screw
Countersunk head hexagon socket cap screws designed to sit flush with the mating surface in recessed assemblies.
Catalogue – Page Image (toggle)
| Thread Size (d) | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | ||||
| Pitch | P | 0,7 | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2 | 2,5 | 2,5 | 2,5 | 3 | |||
| Angle | a | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 60° | 60° | |||
| Head Height | k max. | 2,3 | 2,8 | 3,3 | 4,4 | 5,5 | 6,5 | 7 | 7,5 | 8 | 8,5 | 13,1 | 14 | |||
| Head Diameter | dk max. | 8 | 10 | 12 | 16 | 20 | 24 | 27 | 30 | 33 | 36 | 36 | 39 | |||
| dk min. | 7,64 | 9,64 | 11,57 | 15,57 | 19,48 | 23,48 | 26,48 | 29,48 | 32,38 | 35,38 | 35,38 | 38,38 | ||||
| Socket Width | sw | 2,5 | 3 | 4 | 5 | 6 | 8 | 10 | 10 | 12 | 12 | 14 | 14 | |||
| Diagonal | e min. | 2,87 | 3,44 | 4,58 | 5,72 | 6,86 | 9,15 | 11,43 | 11,43 | 13,72 | 13,72 | 16 | 16 | |||
| Socket Depth | t min. | 1,8 | 2,3 | 2,5 | 3,5 | 4,4 | 4,6 | 4,8 | 5,3 | 5,5 | 5,9 | 8,8 | 10,3 | |||
| Schaft Diameter | ds max | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | |||
| ds min | 3,82 | 4,82 | 5,82 | 7,78 | 9,78 | 11,73 | 13,73 | 15,73 | 17,73 | 19,67 | 21,67 | 23,67 | ||||
| Thread Length | b1 | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | |||
| b2 | – | – | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | ||||
| b3 | – | – | – | – | 45 | 49 | 53 | 57 | 61 | 65 | 69 | 73 | ||||
| b1: Thread length for bolts up to 125 mm | ||||||||||||||||
| b2: Thread length for bolts between 125 & 200 mm | ||||||||||||||||
| b3: Thread length for bolts more than 200 mm | ||||||||||||||||
| Thread Size (d) | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | ||
| Length (L) | min. | max. | Mass for 1,000 units (kg) | |||||||||||
| 10 | 9,71 | 10,29 | 1,07 | 1,85 | 2,70 | 5,47 | – | – | – | – | – | – | – | – |
| 12 | 11,65 | 12,35 | 1,23 | 2,10 | 3,05 | 6,10 | 10,10 | – | – | – | – | – | – | – |
| 16 | 15,65 | 16,35 | 1,53 | 2,59 | 3,76 | 7,35 | 12,10 | 18,30 | – | – | – | – | – | – |
| 20 | 19,58 | 20,42 | 1,84 | 3,09 | 4,46 | 8,60 | 14,10 | 21,20 | 32,40 | – | – | – | – | – |
| 25 | 24,58 | 25,42 | 2,23 | 3,71 | 5,34 | 10,20 | 16,60 | 24,80 | 37,30 | 38,60 | – | – | – | – |
| 30 | 29,58 | 30,42 | 2,90 | 4,33 | 6,22 | 11,70 | 19,10 | 28,50 | 42,20 | 51,80 | – | – | – | – |
| 35 | 34,50 | 35,50 | 3,40 | 5,43 | 7,10 | 13,30 | 21,60 | 32,10 | 47,20 | 58,40 | – | – | – | – |
| 40 | 39,50 | 40,50 | 3,90 | 6,20 | 8,83 | 14,80 | 24,10 | 35,70 | 52,30 | 65,10 | 79,00 | 102,00 | 130,00 | 149,00 |
| 45 | 43,75 | 46,25 | 4,47 | 6,99 | 9,91 | 17,30 | 27,10 | 39,35 | 58,35 | 71,70 | 88,00 | 112,50 | 143,00 | 164,00 |
| 50 | 49,50 | 50,50 | 5,12 | 7,74 | 11,00 | 19,90 | 30,10 | 43,00 | 64,40 | 78,40 | 96,00 | 123,00 | 156,00 | 179,00 |
| 55 | 53,50 | 56,50 | 5,50 | 8,51 | 12,10 | 22,70 | 33,00 | 48,50 | 69,30 | 85,10 | 104,00 | 133,00 | 169,00 | 194,00 |
| 60 | 59,40 | 60,60 | 5,86 | 9,30 | 13,20 | 24,80 | 35,70 | 54,00 | 76,40 | 91,70 | 112,00 | 143,00 | 182,00 | 209,00 |
| 65 | 63,50 | 66,50 | 6,27 | 10,09 | 14,25 | 27,60 | 38,50 | 58,50 | 81,60 | 100,20 | 120,00 | 153,00 | 195,00 | 224,00 |
| 70 | 69,40 | 70,60 | 6,68 | 10,86 | 15,40 | 30,91 | 41,20 | 62,90 | 88,50 | 111,00 | 128,00 | 164,00 | 208,00 | 239,00 |
| 75 | 73,50 | 76,50 | – | 11,65 | 16,50 | 33,70 | 43,90 | 67,40 | 94,60 | 119,00 | 136,00 | 175,00 | 221,00 | 254,00 |
| 80 | 79,40 | 80,60 | – | 12,42 | 17,60 | 36,52 | 46,55 | 71,80 | 100,60 | 127,00 | 144,00 | 186,00 | 234,00 | 269,00 |
| 85 | 83,25 | 86,75 | – | – | 18,70 | 39,30 | 49,20 | 76,40 | 105,10 | 135,00 | 150,00 | 197,00 | 247,00 | 284,00 |
| 90 | 89,30 | 90,70 | – | – | 19,70 | 42,10 | 51,80 | 81,10 | 110,00 | 143,00 | 160,00 | 208,00 | 260,00 | 299,00 |
| 95 | 93,25 | 96,75 | – | – | 20,80 | 44,90 | 54,40 | 85,70 | 117,00 | 151,00 | 168,00 | 219,00 | 273,00 | 315,00 |
| 100 | 99,30 | 100,70 | – | – | 21,90 | 47,70 | 57,00 | 90,40 | 124,80 | 159,00 | 176,00 | 230,00 | 286,00 | 340,00 |