Flat head square neck bolts with hex nut
BN 280
DIN 605 Mu
~UNI 6104
~ČSN 021327
| Headform | 
            Headform
            Countersunk head 120°
 | 
| Thread | 
            Thread
            partially threaded
 | 
| Material | 
            Material
            Steel
 | 
| Property class | 
            Property class
            4.6 / 4.8 (At manufacturer's option)
 | 
| Surface | 
            Surface
            zinc plated blue
 | 
All features
1)At manufacturer's option
Standard
                        DIN 605 Mu
~UNI 6104
~ČSN 021327
                    Additional information
At manufacturer's option, the diameter of the shaft may correspond with the pitch diameter
Features
| Headform | 
            Headform
            Countersunk head 120°
 | 
| Thread | 
            Thread
            partially threaded
 | 
| Material | 
            Material
            Steel
 | 
| Property class | 
            Property class
            4.6 / 4.8 (At manufacturer's option)
 | 
| Surface | 
            Surface
            zinc plated blue
 |