Slotted oval countersunk head tapping screws with cone end type C
BN 991
DIN 7973 C
(Standard withdrawn)
~ISO 1483
~UNI 6953 AB
~ČSN 021238
| Headform | 
                               
            Headform
            Oval countersunk
 
     | 
                    
| Drive | 
                               
            Drive
            Slot
 
     | 
                    
| Thread | 
                               
            Thread
            fully threaded
 
     | 
                    
| Material | 
                               
            Material
            Steel
 
     | 
                    
| Material execution | 
                               
            Material execution
            case-hardened
 
     | 
                    
| Surface | 
                               
            Surface
            zinc plated blue
 
     | 
                    
| Hardness | 
                               
            Hardness
            450 HV
 
     | 
                    
Alle Eigenschaften
Norm
Eigenschaften
| Headform | 
                               
            Headform
            Oval countersunk
 
     | 
                    
| Drive | 
                               
            Drive
            Slot
 
     | 
                    
| Thread | 
                               
            Thread
            fully threaded
 
     | 
                    
| Material | 
                               
            Material
            Steel
 
     | 
                    
| Material execution | 
                               
            Material execution
            case-hardened
 
     | 
                    
| Surface | 
                               
            Surface
            zinc plated blue
 
     | 
                    
| Hardness | 
                               
            Hardness
            450 HV
 
     | 
                    
Warnings
ISO 4042
Quenched and tempered fasteners ≥ 360 HV and tempered case-hardened fasteners with electroplated coatings: Susceptible to hydrogen embrittlement!
Further notice to residual risks can be found on our web page: Notes on use
BN 14067 - DIN 7983 C - ~ISO 7051
Linsensenk-Blechschrauben mit Kreuzschlitz Pozidriv Form Z und Spitze Form C - Stahl - einsatzgehärtet - verzinkt-blau
BN 996 - DIN 7983 C - ~ISO 7051
Linsensenk-Blechschrauben mit Kreuzschlitz Phillips Form H und Spitze Form C - Stahl - einsatzgehärtet - verzinkt-blau