Hex washer head self drilling screw

//Hex washer head self drilling screw
Hex washer head self drilling screw 2018-05-16T22:55:37+00:00

Project Description

Hex washer head self drilling screw

Hex washer head self drilling screw with washer face provides a bearing surface, which could protect the connecting surface. Hex washer head self drilling screw is for metal to metal applications, mostly for roofing to metal frames fastening. For outdoor applications, S-metal offers hex washer head drilling screw with E.P.D.M washer, which offers sealing functions to resistant water leaks.

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.

DIN 7504K hex washer head self drilling screw

hex washer head drilling

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

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