Polished Knurled Nut

This Polished Knurled Nut has standard specs that fit most light to medium-duty uses. Thread sizes cover both metric and imperial types—metric ones range from M2 to M10, and imperial sizes are 1/8" to 3/8". The outer diameter and thickness vary with the thread size, just enough to offer a good hand grip for twisting.

Grades are pretty straightforward. There’s a general-purpose grade for daily use, like small DIY projects, electronic devices, or household tools. Then there’s an industrial grade for slightly heavier jobs, made with thicker metal to handle more pressure. Both grades keep the knurled outer design for tool-free twisting. Polished Knurled Nut’s specs and grades follow basic industry standards, so you just pick based on your bolt size and how much load it needs to bear.

Product quality control

We do basic but necessary checks during production to avoid faulty pieces. First, we inspect the raw metal—make sure it has no cracks or brittle spots that could break when twisted. Then we focus on the knurled ridges; they need to be even and sharp enough for a good hand grip, not too shallow or uneven.

We also test the thread accuracy. The threads must fit standard bolts smoothly, no rough spots that cause jamming when twisting by hand. Every batch has random samples taken for these tests. We also check if the nut’s thickness is consistent, so it doesn’t wobble after installation. No extra fancy checks, just the key ones to ensure it works as it should. Polished Knurled Nut goes through these steps to keep reliable for daily and light industrial use.

Q&A Session

Q:What thread sizes do you offer? Can it match our existing bolts?

A:We have both metric and imperial sizes. Metric ones range from M2 to M10, and imperial sizes are 1/8" to 3/8". Most standard small bolts on the market fit. Just tell us your bolt’s thread size—like M5 or 1/4"—and we’ll confirm the right nut for you. If you’re not sure, send us a photo of your bolt or its spec sheet. We can also send samples to test the fit before you place a bulk order.