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VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
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Hex Washer Head Concrete Screws Blue Steel 7.5mm Fastener for Cement Board
Concrete Screws are also named as masonry screws ,Hex washer head with a slot socket and square cone point with type BP , Concrete screw has a hi-low threads design on the shaft that can drill material more quickly and lock screws into material tightly .
Typical Features
◆ Harden material
◆ High tensile strength
◆ Cutting threads
◆ Hi-low threads
◆ Square cone point
Specification
| Specification | Head dia. | Thread dia. | Length | Pitch |
| d1 | D | d1 | L | P |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 36 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 42 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 52 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 62 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 72 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 80 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 90 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 102 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 112 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 120 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 132 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 142 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 152 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 182 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 190 | 2.4 ~ 2.8 |
| 7.5 | 11 ~ 12 | 7.3 ~ 7.6 | 200 | 2.4 ~ 2.8 |
Installation
1 , Drilling a pre-hole in material with pre-depth for concrete screw ( see details in table )
2 , Inserting concrete screw into hole and screwing it in a electric drill
| Specification | Length | Pre-depth |
| 7.5 | 36 | 2.3 ~ 3.15 |
| 7.5 | 42 | 2.3 |
| 7.5 | 52 | 2.3 |
| 7.5 | 62 | 2.3 |
| 7.5 | 72 | 2.3 |
| 7.5 | 80 | 2.3 |
| 7.5 | 90 | 2.3 |
| 7.5 | 102 | 2.3 |
| 7.5 | 112 | 2.3 |
| 7.5 | 120 | 2.3 |
| 7.5 | 132 | 2.3 |
| 7.5 | 142 | 2.3 |
| 7.5 | 152 | 2.3 |
| 7.5 | 182 | 2.3 |
| 7.5 | 190 | 2.3 |
| 7.5 | 200 | 2.3 |
Plating
Concrete screws normally are plated in zinc with yellow or blue or white color , and sometimes dacromet for applications in heavy corrosion surroundings like sea .
Zinc
The most popular plating for the most products , maks parts are bright and smooth and resistant corrosion
Dacromet
Grey color with High corrosion resistance , no hydrogen embrittlement , heat resistance , easy to plated more , eco-friendly etc
Materials
Carbon steel with model 1018 , 1022 , 1035 , 1045 , SCM 435 and 40CRO
Stainless steel with model SUS 201 , SUS303 , SUS 304 ,SUS 316 , SUS 416 ,SUS 430 and SUS 420 .
Applications
Concrete screws are used for buildings like window frame , door etc that into concrete material .