Grade 10.9 Steel Hex Socket Allen Socket Button Head Screws Bolts Machine Screws DIN 7380
High-quality materials, environmentally friendly, safe and reliable, durable and long life.Excellent craftsmanship, Smooth without burrs, quick and simple use. High strength! high hardness! ● System of Measurement: Inch
● Standard: DIN EN ISO 7380 ( ISO 7380 ) ( GB /T 70.2 )