M12x1.5 Alloy Steel Screw Knurl Studs
black oxide, chrome, zinc,dacromat, etc.
M12x1.5, M12x1.25, 1/2"-20, 7/16"-20,M14x1.5,M14x2.0 and so on
OPP Bag,Neutral Box,Color Box,Head Card,Plastic Box or as request
ISO9001, TS16949, BV, SGS, TUV
Size of Knurl Studs
Good Thread of Knurl studs
The accuracy thread of wheel nut and bolt is very important.
Many factories like to debase quality in this part, such as increase the thread hole of wheel nut, change the bolt with thin thread diameter. They do this because they can save the material and make thread easily. How ever it will affect match fastness of the thread.
To judge the accuracy of thread, firstly we need to check the sharpness of thread, the sharper the better.
In addition, we also need to check it with professional checking tool: screw plug gauge and thread ring gauge. Request : go gauge smoothly, no-go gauge less than 2 screws.
Each product in “HONISHEN” need check one by one by hand, it’s 100% test. Even though it takes us much time and cost, we ensure the product that we offer to you is “perfect”. “HONISHEN” always insist this.
SGS Test Report
This is SGS neutral salt and spray test of our products. It doesn’t rust after 120 hours.
salt and spray test result from SGS.pdf
Different packing way
We have several kinds of package. The most popular one is blister,20 pcs nuts with one key. Another is blister with box. If you want sell it in Amazon, you could also choose color box, when you open it, there is sponge to protect products. You could print your company name or logo on box. We also have neutral box, you could choose white, black or brown.
During the production process. each product receive strict quality check, then we can send them to our customers. Quality Control includes 4 steps: first check – self check – tour check – finial check
We ask worker do 100% self check.
When order is big, we checked it by automatic thread inspection machine, which is purchased from Taiwan, we could choose full automatic thread check in order to save cost, but the nuts in the vibrating disk is have chance to scratch, so we ask worker put the product by hand. Otherwise, if small order, check products by workers.
After package,each carton will put a QR CODE sticker. When we scan qr code with PDA, we could know material batch,production size, production process, which worker make each process and so on.