... THE SCREW ACCORDING TO YOUR DRAWINGS---------------------------- Left Hand Threaded Rod 1. Standard of Left Hand Threaded Rod : ISO,JIS,GB ... Carbon steel,Stainless steel304,316,Alloy steel,Plastic3. Dimension of Left Hand Threaded Rod : M3-M1004. Surface treatment:: Zinc,Nickel ... WE CAN CUSTOMIZE THE SCREW ACCORDING TO YOUR DRAWINGS---------------------------- Left Hand Threaded Rod