Countersunk Square M16 x 90mm Black Gr.4.8 DIN 608

Countersunk Square
Metric
Black Grade 4.6
Dia: M16
Pitch: 2
Length: 90mm
DIN 608
Wrench Size Across Flats: 24mm - to fasten nut only.
The DIN 608 countersunk square bolt (commonly called a plow bolt or flat countersunk square neck bolt) is a metric fastener designed for applications requiring a flush surface finish and an anti-rotation locking feature.