Dry wall , self drilling screws
Made in Taiwan
- Drywall Screw
Size : 3.5 x 25 - 3.5 x 35
Specifications
| Head | Bugle head , wafer head |
| Recess | Phillips |
| Thread type | Fire thread , coarse thread - low thread |
| Point type | Sharp point , self drilling point |
| Material | Carbon steal |
| Case hardness | Steel - rock/well c44 min |
| Finish | Zinc plated , Black posphate |
Self Drilling Screw :
Specifications :
| 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 |