... size 3).Material: carbon steel, stainless steel brass FR-N021-02 Insert bar,threaded machining part, threading barthreaded rod1).custom available2 ... : carbon steel, stainless steel brass,material 304 302 321 304L 201 667 668 316 316L4).Grade:4.8 6.8 8 ... ,bending or cutting, mold designing and making etc. • FR-N021-02 Insert bar,threaded machining part, threading bar