Project Description
Color painted self drilling screw
Hex head self drilling screw with flange provides large bearing surface, which protect the connecting surface during assembly. S-metal offers hex flange head drilling screw with EPDM washer(roofing screw), in which the EPDM washer offers sealing functions,to resistant water leaks during its working.Hex washer head self drilling screw is for metal to metal applications, mostly for roofing to metal frames fastening. Various color painting for outdoor decoration applications,
Standards:DIN 7504 K,ISO 15480, SAE J78.
Material :Case hardened steel C 1018,C 1022 with heat-treated
Stainless steel 304/316/410.
Surface:zinc plated, H.D.G, Black phosphated.
Surface hardness:The minimum surface hardness of self drilling screws after heat treatment shall be 530 HV.
Core hardness:The core hardness after heat treatment shall be 320 HV to 400 HV.
Tolerance: Grade A conforming to ISO 4759-1.
Color painted hex head self drilling screw
Dimension in mm.
| Size d | P | dc | h min | s | k | L | |||
| max | min | max | min | max | min | ||||
| ST2.9 | 1.1 | 6.3 | 5.8 | 0.4 | 4 | 3.82 | 2.8 | 2.5 | 13-50 |
| ST3.5 | 1.3 | 8.3 | 7.6 | 0.6 | 5.5 | 5.32 | 3.4 | 3 | |
| ST3.9 | 1.3 | 8.3 | 7.6 | 0.6 | 5.5 | 5.32 | 3.4 | 3 | |
| ST4.2 | 1.4 | 8.8 | 8.1 | 0.8 | 7 | 6.78 | 4.1 | 3.6 | 16-100 |
| ST4.8 | 1.6 | 10.5 | 9.8 | 0.9 | 8 | 7.78 | 4.3 | 3.8 | |
| ST5.5 | 1.8 | 11 | 10 | 1 | 8 | 7.78 | 5.4 | 4.8 | |
| ST6.3 | 1.8 | 13.5 | 12.2 | 1 | 10 | 9.78 | 5.9 | 5.3 | 32-200 |
| ST8 | 2.1 | 18 | 16.7 | 1.2 | 13 | 12.73 | 7 | 6.4 | |
