Solid Brass Pure Copper Thread Injection Molding Knurl Embedded Insert Nut Nutsert M2 M2.5 M3 M4 M5 M6 M8 M10Inside thread diameter:2mm(M2) / 2.5mm(M2.5) / 3mm(M3) / 4mm(M4) / 5mm(M5) / 6mm(M6) / 8mm(M8) / 10mm(M10)Outside thread diameter:M2(3.5mm) / M2.5(3.5mm) / M3(4.1/4.5/5.3/6mm) / M4(5.1/6.3/7/8mm) / M5(6.3/7.3/8.3mm) / M6(8.3/10mm) / M8(10.3/12mm) / M10(12mm)Inside thread pitch:0.4mm(M2) / 0.45mm(M2.5) / 0.5mm(M3) / 0.7mm(M4) / 0.8mm(M5) / 1.0mm(M6) / 1.25mm(M8) / 1.5mm(M10) FAQQ: If i fail to receive the object in estimated time ?A: Don't fear ,because infrequently there will be some delivery put off thanks to vacation or flawed address, pls contact the seller via e-mail, we are able to aid you contact the shipping company to unravel it successfully and at last get it . If you can't acquire it, we will complete refund or resend it for you. We are honest seller, so don't worry.Q: What may well i do if i receive the damaged item?A: Don't fear , will challenge you the refund or send a new one if we get the broken picture of the object from you .you don't must open a return request because you might help us dispose it ,many thank you !Q: I am not convinced with the product,what should i do?A:Please contact with us in time, we are able to show you how to clear up it.