DIN 1587
Hexagon Domed (Acorn) Cap Nuts
Equivalent Standard: UNI 5721
Metric DIN 1587 hexagon domed cap nuts are often referred to as acorn cap nuts. These nuts have a smooth rounded head that covers the hex nut base. The domed surface protects the bolt threads underneath while providing a finished appearance and may improve safety in certain circumstances. BRK Industries offers one of the most complete ranges of metric nuts and other inch and metric industrial fasteners for immediate delivery from stock. The following sizes of metric DIN 1587 hexagon domed cap nuts are available for immediate shipping from stock: Diameters ranging from M4 to M30 in 303, A2 and marine grade A4 stainless steel in coarse and fine threads. View parts by clicking on the following link: Hexagon Domed Cap Nuts DIN 1587
- DIN 1587 Hexagon Domed (Acorn) Cap Nuts
- Material Grade: 6
- Finish: Self, Black, Bright Zinc, Hot Dip Galvanized
- Thread: METRIC
Technical Specification for DIN 1587 Hexagon Domed (Acorn) Cap Nuts
| Thread | Series 1 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 |
| Series 2 | – | – | – | M8x1 | M10x1 | M12x1,5 | (M14x1,5) | (M16x1,5) | (M18x1,5) | M20x2 | (M22x1,5) | M24x2 | |
| Series 3 | – | – | – | – | M10x1,25 | M12x1,25 | – | – | (M18x2) | M20x1,5 | (M22x2) | – | |
| P | Series 1 | 0,7 | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2 | 2,5 | 2,5 | 2,5 | 3 |
| da | min. | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
| max. | 4,6 | 5,75 | 6,75 | 8,75 | 10,8 | 13 | 15,1 | 17,3 | 19,5 | 21,6 | 23,7 | 25,9 | |
| dk | max. | 6,5 | 7,5 | 9,5 | 12,5 | 15 | 17 | 20 | 23 | 26 | 28 | 33 | 34 |
| dw | min. | 5,9 | 6,9 | 8,9 | 11,6 | 14,6 | 16,6 | 19,6 | 22,5 | 24,9 | 27,7 | 31,4 | 33,3 |
| e min. | Product grade A | 7,66 | 8,79 | 11,05 | 14,38 | 17,77 | 20,03 | 23,35 | 26,75 | 30,14 | 33,53 | 37,72 | 39,98 |
| Product grade B | 7,5 | 8,63 | 10,89 | 14,2 | 17,59 | 19,85 | 22,78 | 26,17 | 29,56 | 32,95 | 37,29 | 39,55 | |
| x max. | Series 1 | 1,4 | 1,6 | 2 | 2,5 | 3 | – | – | – | – | – | – | – |
| Series 2 | – | – | – | 2 | 2 | – | – | – | – | – | – | – | |
| Series 3 | – | – | – | – | 2,5 | – | – | – | – | – | – | – | |
| g2 max. | Series 1 | – | – | – | – | – | 6,4 | 7,3 | 7,3 | 9,3 | 9,3 | 9,3 | 10,7 |
| Series 2 | – | – | – | – | – | 5,6 | 5,6 | 5,6 | 5,6 | 7,3 | 5,6 | 7,3 | |
| Series 3 | – | – | – | – | – | 4,9 | – | – | 7,3 | 5,6 | 7,3 | – | |
| h | max. nominal size | 8 | 10 | 12 | 15 | 18 | 22 | 25 | 28 | 32 | 34 | 39 | 42 |
| min. P. grade A | 7,64 | 9,64 | 11,57 | 14,57 | 17,57 | 21,48 | 24,48 | 27,48 | 32,38 | 33,38 | 38,38 | 41,38 | |
| min. P. grade B | 7,42 | 9,42 | 11,3 | 14,3 | 17,3 | 21,16 | 24,16 | 27,16 | 31 | 33 | 38 | 41 | |
| m | max. | 3,2 | 4 | 5 | 6,5 | 8,8 | 10 | 11 | 13 | 15 | 16 | 18 | 19 |
| min. | 2,9 | 3,7 | 4,7 | 6,14 | 7,64 | 9,64 | 10,3 | 12,3 | 14,3 | 14,9 | 16,9 | 17,7 | |
| Mw | min. | 2,32 | 2,96 | 3,76 | 4,91 | 6,11 | 7,71 | 8,24 | 9,84 | 11,44 | 11,92 | 13,52 | 14,16 |
| r | approx. | 3,25 | 3,75 | 4,75 | 6,25 | 7,5 | 8,5 | 10 | 11,5 | 13 | 14 | 16,5 | 17 |
| s | Max. = nominal size | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 |
| min. P. grade A | 6,78 | 7,78 | 9,78 | 12,73 | 15,73 | 17,73 | 20,67 | 23,67 | 26,67 | 29,67 | 33,38 | 35,38 | |
| min. P. grade B | 6,64 | 7,64 | 9,64 | 12,57 | 15,57 | 17,57 | 20,16 | 23,16 | 26,16 | 29,16 | 33 | 35 | |
| t | min. | 5,26 | 7,21 | 7,71 | 10,65 | 12,65 | 15,65 | 17,65 | 20,58 | 24,58 | 25,58 | 28,58 | 30,5 |
| max. | 5,74 | 7,79 | 8,29 | 11,35 | 13,35 | 16,35 | 18,35 | 21,42 | 25,42 | 26,42 | 29,42 | 31,5 | |
| w | min. | 2 | 2 | 2 | 2 | 2 | 3 | 4 | 4 | 5 | 5 | 5 | 6 |
| Weight kg/1000pcs | – | – | 4,66 | 11 | 20,1 | 28,3 | – | 54,3 | 95 | 104 | – | 216 |
