Stainless steel screws umbrella head screws M3-M6 M4*25

▸ Material composition: made of 304 stainless steel
▸ Specification range: M3-M6 machine wire screws
▸ Head type: large flat head umbrella head design | Cross groove type
▸ Size parameters: M4×25 (diameter × length)
▸ Executive standard: GB/T 845-1985 cross groove pan head self-tapping screw