Description
M3, M4 Metric Coarse Thread 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: Metric ● Standard: DIN EN ISO 7380 ( ISO 7380 ) ( GB /T 70.2 ) ● Drive Style: Hex-key ● Material: Carbon Steel ● Grade 10.9 ● Finish: Black Oxide ● Head Style: Hex Socket Allen Socket Button Head ● Coarse Thread ● Thread Size: M3, M4 ● Length: 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, 40 mm, 45 mm, 50 mm ( Does not include head length.)