CRS8139 is used for processing thread on rod, anchor bolt, pipe, steel bar. We are China Rebar Splicing Co.,Ltd, Contact: Jojo Wu, Tel: 0086-010-87518930, e-mail: jojo@sinocrs.com, skype: jojocrs88, Mobile: 0086-15810579323,
Tifalloy Hex Nuts are stronger and harder than standard Grade 8 hex nuts.
https://www.tifco.com