Product：hexagon head screws / half thread
Specification：M20-M72
Property Class: ISO898-1 8.8, 10.9
Elongation after fracture
Minimum tensile strength
Lower yield strength or stress ar 0.2% non-proportional elongation
Stress under proof load
Strength under wedge loading
Hardness
Impact strength Kv， min at -20℃
Above property requirements comform to ISO898-1
Thread tolerance：6g,6e,6h
Tolerance standard：ISO 4759-1
Surface defect：ISO 6157-1
Quality management systems: ISO9001
Post time: Dec-31-2021