快乐飞艇分析软件
快乐飞艇计划app
Stainless Socket Head Screws are available to order online from IMS Bolt.
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
快乐飞艇最新开奖结果
Coarse threads are the industry standard; choose these screws if you dont know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
Screws that meet ISO 21269 and ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.
