The High Torque Crown Nut With Slot is a special fastener used in important jobs where you need to make sure it stays locked in place, even with vibrations or if it tries to twist. It looks like a regular hex nut, but on top there’s a cylindrical crown part with a slot cut into it. That slot lets you lock it tight using a cotter pin or safety wire. These nuts stay put when regular nuts might come loose, so they’re pretty necessary for tough mechanical setups—especially in aerospace, car making, and heavy machinery, where safety really matters.
Mon | M20 | M24 | M30 | M36 |
P | 1.5|2|2.5 | 1.5|2|3 | 1.5|2|3.5 | 1.5|2|3|4 |
d1 max | 28 | 34 | 42 | 50 |
d1 min | 27.16 | 33 | 41 | 49 |
e min | 32.95 | 39.55 | 50.85 | 60.79 |
k max | 26.3 | 31.9 | 37.6 | 43.7 |
k min | 25.46 | 31.06 | 36.7 | 42.7 |
n min | 4.5 | 5.5 | 7 | 7 |
n max | 5.7 | 6.7 | 8.5 | 8.5 |
s max | 30 | 36 | 46 | 55 |
s min | 29.16 | 35 | 45 | 53.8 |
w max | 20.3 | 23.9 | 28.6 | 34.7 |
w min | 19 | 22.6 | 27.3 | 33.1 |
The main thing about High Torque Crown Nut With Slot is that they can lock in place on their own. Here’s how it works: once you tighten the nut to the right torque on a bolt or stud that has a crosswise hole, you line up the slot in the nut’s crown with that hole. Then you stick a cotter pin or safety wire through both the slot and the hole. This thing can prevent the nut from being turned back - if you turn it back, the nut will loosen; and depending on how you wire the wiring, sometimes it can even stop the nut from being turned too hard forward to prevent it from being over-tightened. That way, the connection stays put even with vibrations and can’t be messed with easily—something that’s really important for critical setups.
Q:What are the standard material specifications and grades available for your High Torque Crown Nut With Slot?
A:Our High Torque Crown Nut With Slot are usually made from carbon steel (Grades 4.8, 8.8), alloy steel (Grade 10.9), or stainless steel (A2-304, A4-316). Specific material certificates (e.g., EN 10204 3.1) are available upon request. We make sure these nuts meet international standards such as DIN 935 or ISO 4161 when it comes to material properties. That way, they’re strong and long-lasting enough for tough jobs where you need a reliable lock.