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(Standard withdrawn)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
|
All features
Standard
DIN 7973 C (Standard withdrawn)
~ISO 1483
~UNI 6953 AB
~ČSN 021238
Features
| 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