Castle Nuts (DIN 935)
Equivalent Standard: ISO 7035 | UNI 5593
Castle nuts from BRK Industries come with pre-drilled holes through which cotter pins can be inserted to hold the nuts securely in place. This gives the nuts the ability to withstand constant vibrations and allows them to stay in place during small movements. As these nuts are pre-drilled, they can be used without a pilot hole. These nuts are slotted, allowing it to be installed and removed using screwdrivers. It is available in stainless steel, carbon steel, and alloy steel to bear more wear and tear while also making it more corrosion resistant.
Their structural uniqueness allows them to be used in mechanical and automotive applications where positive locking is required, like holding a wheel bearing in place. It is also used as a safety nut for other component designing applications. These screws are characterised by the protrusions extending from their bodies, which make it look like a castle’s top – hence the name castle nuts.
- DIN 935
- Class: 5, 6, 8, 10
- Finish: BZP
- Thread: METRIC
DIN 935
Metric DIN 935 Hexagon Slotted Castle Nuts are hex nuts where slots are cut into one side of the nut (DIN 935 up to 12mm dia) or through the crown (> 12mm dia). These slots are designed to offer a locking feature where a split pin/cotter pin (DIN 94), R clip or safety wire can aligned through the slots and guided through a hole drilled in the shank of the mated bolt. BRK Industries offers the following sizes for immediate delivery from stock: Diameters ranging from M5 to M39 available in A2 and marine grade A4 stainless steel as well as zinc plated steel. View available parts by clicking on the following link: Hexagon Slotted Castle Nuts DIN 935
Technical Specification for DIN 935 Castle Nuts
| Thread d | M4 | M5 | M6 | (M7) | M8 | M10 | M12 | (M14) | M16 | (M18) | ||||
| – | – | – | – | M8x1 | M10x1 | M12x1,5 | (M14x1,5) | M16x1,5 | (M18x1,5) | |||||
| – | – | – | – | – | M10x1,25 | M12x1,25 | – | – | (M18x2) | |||||
| P | 0,7 | 0,8 | 1 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2 | 2,5 | ||||
| da | min. | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 14 | 16 | 18 | |||
| max. | 4,6 | 5,75 | 6,75 | 7,75 | 8,75 | 10,8 | 13 | 15,1 | 17,3 | 19,5 | ||||
| de | max. | – | – | – | – | – | – | 16 | 17 | 18 | 19 | 22 | 25 | |
| min. | – | – | – | – | – | – | 15,57 | 16,57 | 17,57 | 18,48 | 21,48 | 24,3 | ||
| dw | min. | 5,8 | 6,8 | 8,8 | 9,5 | 11,3 | 14,3 | 15,3 | 16,2 | 17,2 | 19,2 | 20,2 | 22,2 | 24,8 |
| e | min. | 7,66 | 8,79 | 11,05 | 12,12 | 14,38 | 17,77 | 18,9 | 20,03 | 21,1 | 23,35 | 24,49 | 26,75 | 29,56 |
| m | nominal=max. | 5 | 6 | 7,5 | 8 | 9,5 | 12 | 15 | 16 | 19 | 21 | |||
| min. | 4,7 | 5,7 | 7,14 | 7,64 | 9,14 | 11,57 | 14,57 | 15,57 | 18,48 | 20,16 | ||||
| m´ | min. | 2,3 | 3 | 3,8 | 4,2 | 4,9 | 6,1 | 7,7 | 8,2 | 9,8 | 11,2 | |||
| n | min. | 1,2 | 1,4 | 2 | 2 | 2,5 | 2,8 | 3,5 | 3,5 | 4,5 | 4,5 | |||
| max. | 1,45 | 1,65 | 2,25 | 2,25 | 2,75 | 3,05 | 3,8 | 3,8 | 4,8 | 4,8 | ||||
| s | nominal=max. | 7 | 8 | 10 | 11 | 13 | 16 | 17 | 18 | 19 | 21 | 22 | 24 | 27 |
| min. | 6,78 | 7,78 | 9,78 | 10,73 | 12,73 | 15,73 | 16,73 | 17,73 | 18,67 | 20,67 | 21,67 | 23,67 | 26,16 | |
| w | min. | 2,9 | 3,7 | 4,7 | 5,2 | 6,14 | 7,64 | 9,64 | 10,57 | 12,57 | 14,57 | |||
| max. | 3,2 | 4 | 5 | 5,5 | 6,5 | 8 | 10 | 11 | 13 | 15 | ||||
| Split pin as in DIN 94 | 1×10 | 1,2×12 | 1,6×14 | 1,6×14 | 2×16 | 2,5×20 | 3,2×22 | 3,2×25 | 4×28 | 4×32 | ||||
| Thread d | M20 | (M22) | M24 | (M27) | M30 | (M33) | M36 | (M39) | M42 | (M45) | ||
| M20x2 | (M22x1,5) | M24x2 | (M27x2) | M30x2 | (M33x2) | M36x3 | (M39x3) | M42x3 | (M45x3) | |||
| M20x1,5 | M22x2) | – | – | – | – | – | – | – | – | |||
| P | 2,5 | 2,5 | 3 | 3 | 3,5 | 3,5 | 4 | 4 | 4,5 | 4,5 | ||
| da | min. | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | |
| max. | 21,6 | 23,8 | 25,9 | 29,2 | 32,4 | 35,6 | 38,9 | 42,1 | 45,4 | 48,6 | ||
| de | max. | 28 | 30 | 32 | 34 | 38 | 42 | 46 | 50 | 55 | 58 | 62 |
| min. | 27,3 | 29,3 | 31 | 33 | 37 | 41 | 45 | 49 | 53,8 | 56,8 | 60,8 | |
| dw | min. | 27,7 | 29,5 | 31,3 | 33,2 | 38 | 42,7 | 46,6 | 51,1 | 55,9 | 60,6 | 64,7 |
| e | min. | 32,95 | 35,03 | 37,29 | 39,55 | 45,2 | 50,85 | 55,37 | 60,79 | 66,44 | 71,3 | 76,95 |
| m | nominal=max. | 22 | 26 | 27 | 30 | 33 | 35 | 38 | 40 | 46 | 48 | |
| min. | 21,16 | 25,16 | 26,16 | 29,16 | 32 | 34 | 37 | 39 | 45 | 47 | ||
| m´ | min. | 11,9 | 13,5 | 14,2 | 16,6 | 18,2 | 19,8 | 21,9 | 23,5 | 25,9 | 27,5 | |
| n | min. | 4,5 | 5,5 | 5,5 | 5,5 | 7 | 7 | 7 | 7 | 9 | 9 | |
| max. | 4,8 | 5,8 | 5,8 | 5,8 | 7,36 | 7,36 | 7,36 | 7,36 | 9,36 | 9,36 | ||
| s | nominal=max. | 30 | 32 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 |
| min. | 29,16 | 31 | 33 | 35 | 40 | 45 | 49 | 53,8 | 58,8 | 63,1 | 68,1 | |
| w | min. | 15,57 | 17,57 | 18,48 | 21,48 | 23,48 | 25,48 | 28,48 | 30,28 | 33,38 | 35,38 | |
| max. | 16 | 18 | 19 | 22 | 24 | 26 | 29 | 31 | 34 | 36 | ||
| Split pin as in DIN 94 | 4,36 | 5×36 | 5×40 | 5×45 | 6,3×50 | 6,3×56 | 6,3×63 | 6,3×71 | 8×71 | 8×80 | ||
| Thread d | M48 | (M52) | M56 | (M60) | M64 | (M68) | M72x6 | (M76x6) | M80x6 | (M85x6) | M90x6 | M100x6 | |
| M48x3 | (M52x3) | M56x4 | (M60x4) | M64x4 | (M68x4) | M72x4 | (M76x4) | M80x4 | (M85x4) | M90x4 | M100x4 | ||
| P | 5 | 5 | 5,5 | 5,5 | 6 | 6 | – | – | – | – | – | – | |
| da | min. | 48 | 52 | 56 | 60 | 64 | 68 | 72 | 76 | 80 | 85 | 90 | 100 |
| max. | 51,8 | 56,2 | 61 | 64,8 | 69,1 | 73,4 | 77,8 | 82,1 | 86,4 | 91,8 | 97,2 | 108 | |
| de | max. | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 120 | 130 |
| min. | 63,8 | 68,8 | 73,8 | 78,8 | 83,6 | 88,6 | 93,6 | 98,6 | 103,6 | 108,6 | 118,6 | 128,4 | |
| dw | min. | 69,4 | 74,2 | 78,7 | 83,4 | 88,2 | 92,9 | 97,7 | 102,4 | 107,2 | 111,9 | 121,1 | 135,4 |
| e | min. | 82,6 | 88,25 | 93,56 | 99,21 | 104,86 | 110,51 | 116,16 | 121,81 | 127,46 | 133,11 | 144,08 | 161,02 |
| m | nominal=max. | 50 | 54 | 57 | 63 | 66 | 69 | 73 | 76 | 79 | 88 | 92 | 100 |
| min. | 49 | 52,8 | 55,8 | 61,8 | 64,8 | 67,8 | 71,8 | 74,8 | 77,8 | 86,6 | 90,6 | 98,6 | |
| m´ | min. | 29,1 | 32,3 | 34,7 | 37,1 | 39,3 | 41,7 | 44,9 | 47,3 | 49,7 | 52,9 | 56,1 | 62,5 |
| n | min. | 9 | 9 | 9 | 11 | 11 | 11 | 11 | 11 | 11 | 14 | 14 | 14 |
| max. | 9,36 | 9,36 | 9,36 | 11,43 | 11,43 | 11,43 | 11,43 | 11,43 | 11,43 | 14,43 | 14,43 | 14,43 | |
| s | nominal=max. | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 130 | 145 |
| min. | 73,1 | 78,1 | 82,8 | 87,8 | 92,8 | 97,8 | 102,8 | 107,8 | 112,8 | 117,8 | 127,5 | 142,5 | |
| w | min. | 37,38 | 41,38 | 44,38 | 47,38 | 50,26 | 53,26 | 57,26 | 60,26 | 63,26 | 67,26 | 71,26 | 79,26 |
| max. | 38 | 42 | 45 | 48 | 51 | 54 | 58 | 61 | 64 | 68 | 72 | 80 | |
| Split pin as in DIN 94 | 8×80 | 8×90 | 8×100 | 10×100 | 10×100 | 10×112 | 10×112 | 10×125 | 10×140 | 13×140 | 13×140 | 13×160 | |