1.heavy duty nuts, biggest size to be M70 2.high quality 3. ... 4.reasonable price 5.good service We can provider heavy duty nuts , M 50, M60,M70 all is OK.If you ... need such nuts, please contract us.We hope to have a chance to sold our products ... serve you good.Do not hesitete to send inquiry to us, any time. We will try to reply as soon as ...