| Standard |
DIN7504 (K , L , N , P . Q ) / ASME B18.6.4 & SAE J78 |
| Head |
Hex head , hex flange head , pan head , pan farming head , flat head , truss head wafer head , oval head |
| Recess |
Phillips , pozi , slotted , trox , hex undercut , square |
| Thread type |
Fire thread , coarse thread - low thread |
| Thread Point type |
Type BSD , type CSD , spade – shaped point, high – low thread |
| Material |
Carbon steel , stainless steal |
| Case hardness |
Steel / Rockwell C52-58 |
| Core hardware |
Steel / rockwall (32 – 40 ) |
| Finish |
Zinc plated 3-5 um / of 5-8 um |
