We provide official quality inspection certificates for Precision Machined Slotted round nuts to prove that they meet industry standards. Each certificate for a nut includes the batch number, material test results, and details of mechanical properties such as anti-torque strength and thread accuracy.
Our quality certificates come from independent labs or our own quality team, and they confirm the nuts meet standards like ISO 898-2 and DIN 935. We document every check, from the raw materials to the finished product, so you can easily review the nut quality.
For large orders, we include a physical certificate with the shipment. For smaller orders, we can send you a digital copy if you ask for it. This way, you have all the information about the nut's quality when you're ready to use them in your machinery.
Precision Machined Slotted round nut are special fasteners used to hold parts in place on mechanical equipment where regular nuts might come loose from vibration. The main use of nut is on cars and industrial machines—specifically axles, shafts, and moving parts that need a permanent lock.
They’re also widely used on farm equipment, marine engines, and heavy machinery, since the slot-and-cotter-pin setup stops the nut from unscrewing when the machine is running nonstop. DIY mechanics and small shops often use these nuts for jobs like fixing gearboxes, wheel hubs, or steering parts. Their simple design keeps them from shaking loose, which is good for any job that needs a secure fit. You just need a standard wrench and a cotter pin to install them; no special tools are necessary.
Can the Precision Machined Slotted round nut be customized for specific applications or materials?
Yes, we can customize the nut for you—we can change the material, coating, or slot sizes to fit your specific project needs. This makes sure it works with your specialized equipment, and we work closely with you to meet your exact requirements while keeping the quality up to standard.
| d | dk | n | t | m |
| M10*1 | 22 | 4.3 | 2.6 | 8 |
| M12*1.25 | 25 | 4.3 | 2.6 | 8 |
| M14*1.5 | 28 | 4.3 | 2.5 | 8 |
| M16*1.5 | 30 | 5.2 | 3.1 | 8 |
| M18*1.5 | 32 | 5.3 | 3.1 | 8 |
| M20*1.5 | 35 | 5.3 | 2.8 | 8 |
| M22*1.5 | 38 | 5.3 | 3.1 | 10 |
| M24*1.5 | 42 | 5.3 | 3.1 | 10 |
| M25*1.5 | 42 | 5.3 | 3.1 | 10 |
| M27*1.5 | 45 | 5.3 | 3.1 | 10 |
| M30*1.5 | 48 | 5.3 | 3.1 | 10 |
| M33*1.5 | 52 | 6.3 | 3.6 | 10 |
| M35*1.5 | 52 | 6.3 | 3.6 | 10 |
| M36*1.5 | 55 | 6.3 | 3.6 | 10 |
| M39*1.5 | 58 | 6.3 | 3.6 | 10 |
| M40*1.5 | 58 | 6.3 | 3.6 | 10 |
| M42*1.5 | 62 | 6.3 | 3.6 | 10 |
| M45*1.5 | 68 | 6.3 | 3.6 | 10 |
| M48*1.5 | 72 | 8.3 | 4.2 | 12 |
| M50*1.5 | 72 | 8.3 | 4.2 | 12 |
| M52*1.5 | 78 | 8.3 | 4.2 | 12 |
| M55*2 | 78 | 8.3 | 4.2 | 12 |
| M60*2 | 90 | 8.3 | 4.2 | 12 |
| M64*2 | 95 | 8.3 | 4.2 | 12 |
| M65*2 | 95 | 8.3 | 4.2 | 12 |
| M68*2 | 100 | 10.3 | 4.7 | 12 |
| M72*2 | 105 | 10.3 | 4.7 | 15 |
| M75*2 | 105 | 10.3 | 4.7 | 15 |
| M80*2 | 115 | 10.3 | 4.7 | 15 |
| M85*2 | 120 | 10.3 | 4.7 | 15 |
| M90*2 | 125 | 12.4 | 5.7 | 18 |
| M95*2 | 130 | 12.4 | 5.7 | 18 |
| M100*2 | 135 | 12.4 | 5.7 | 18 |
| M105*2 | 140 | 12.4 | 5.7 | 18 |
| M110*2 | 150 | 14.4 | 6.7 | 18 |
| M115*2 | 155 | 14.4 | 6.7 | 22 |
| M120*2 | 160 | 14.4 | 6.7 | 22 |
| M125*2 | 165 | 14.4 | 6.7 | 22 |
| M130*2 | 170 | 14.4 | 6.7 | 22 |
| M140*2 | 180 | 14.4 | 6.7 | 26 |
| M150*2 | 200 | 16.4 | 7.9 | 26 |
| M160*3 | 210 | 16.4 | 7.9 | 26 |
| M170*3 | 220 | 16.4 | 7.9 | 26 |
| M180*3 | 230 | 16.4 | 7.9 | 30 |
| M190*3 | 240 | 16.4 | 7.9 | 30 |
| M200*3 | 250 | 16.4 | 7.9 | 30 |