Allen Socket Countersunk Screws M3 M4 DIN 7991 Flat Head Bolts Grade 10.9 Steel

Hex Socket CountersunkScrewsAllen Key Drive Socket Flat Head Bolts Machine Screws DIN 7991 Steel Grade 10.9. ● Standard: GB /T 70.3 ( ISO 10642 ) ( DIN 7991 ). ● Thread Size: M3, M4. ● Length: 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, 38 mm, 40 mm,45 mm, 50 mm ( Including head length.).