Industrial nails (straight nails)
The nail range is F10-F50 (10-50 represents foot length)
Below 140 pieces, wire diameter 1.19 flattened 1.0
Less than 100 pieces, round wire 1.51, flattened thickness 1.35
Also known as code nails, U25 can only produce 80 nails, and the thickness of the flattened nail is below 0.65.
U60 machine, can produce N nail, P nail, and sealing nail.