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Address: NO.12 HUANGHE RD ,HUANGJINAG , DONGGUAN, GD,CHINA
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7.5 mm Carbon Steel Torx Head Masonry Screws For Concrete Galvanized Fastener
Masonry Screws are also known as concrete screws mainly used to concrete , harden brick and block etc . enhanced flat head and torx drive , the point for masonry screw is cone shape that lets it drill material as fast as soon .
Normally , the thread diameter is 7.5mm ( 0.295 Inch ) and length can be up to 300 mm , Hi-low tapping threads with cutting line ( if required ) and sharp point style , sometimes , the point can be cut for more easy to drill hole .
The head drive for masonry screws can be designed in different styles as following
Typical Features
◆ Harden material
◆ High tensile strength
◆ Perfect drilling performance
◆ Long Service
Specification
| Specification | Head dia. | Thread dia. | Length | Pitch |
| d | D | d | 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 driller
| 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 |
Finishing
Concrete screws normally are plated in zinc with yellow or blue or white color , and sometimes dacromet for applications in sea .
Zinc
The most popular plating for the most products , making parts are bright and smooth and resistant corrosion
Dacromet
This finish is grey color with High corrosion resistance , No hydrogen embrittlement ,Heat resistance ,Easy to plated more ,eco-friendly etc charictersitics and the film thickness is 4-8μm ; Its used for Heavy-load truck ,engine ,Marine equipments etc
Material
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 .
