These cap nuts also known as acorn nuts, made by copper, they have a smooth rounded head that covers and protects threads while providing a finished appearance.
Screw Thread d | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | |
P | Pitch(Coarse thread) | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 |
Pitch(Fine thread) | / | / | / | 1 | 1.25 | 1.25 | 1.5 | 1.5 | 1.5 | |
h | Nominal Size | 6.2 | 7.5 | 9.5 | 12.5 | 15.5 | 18.5 | 21 | 24 | 27 |
max | 6.45 | 7.75 | 9.75 | 12.8 | 15.8 | 18.8 | 21.3 | 24.4 | 27.4 | |
min | 5.95 | 7.25 | 9.25 | 12.2 | 15.2 | 18.2 | 20.7 | 23.6 | 26.6 | |
k | max | 3.2 | 4 | 5 | 6.5 | 8 | 10 | 11 | 13 | 15 |
min | 2.9 | 3.7 | 4.7 | 6.14 | 7.64 | 9.64 | 10.57 | 12.57 | 14.57 | |
s | max | 7 | 8 | 10 | 13 | 17 | 19 | 22 | 24 | 27 |
min | 6.8 | 7.8 | 9.8 | 12.75 | 16.75 | 18.65 | 21.65 | 23.65 | 26.65 | |
Screw Thread d | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | ||
P | Pitch(Coarse thread) | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | |
Pitch(Fine thread) | 1.5 | 1.5 | 2 | 2 | 2 | 2 | 2 | 2 | ||
h | Nominal Size | 29 | 32.5 | 35.5 | 41 | 45 | 49 | 54.5 | 59 | |
max | 29.4 | 32.9 | 35.9 | 41.5 | 45.5 | 49.5 | 55 | 59.5 | ||
min | 28.6 | 32.1 | 35.1 | 40.5 | 44.5 | 48.5 | 54 | 58.5 | ||
k | max | 16 | 18 | 19 | 22 | 24 | 26 | 29 | 31 | |
min | 15.57 | 17.57 | 18.48 | 21.48 | 23.48 | 25.48 | 28.48 | 30.38 | ||
s | max | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | |
min | 29.65 | 31.6 | 35.6 | 40.6 | 45.6 | 49.6 | 54.55 | 59.55 |