VEDALI HARDWARE CO., LTD
VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
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Flat Head Square Drive Robertson Screw For Wood Galvanized Steel Fastener
Square drive or Robertson@ drive screw with flat head sharp point and wood threads for application on wooden parts .
Robertson square screws has a 90 degree or 120 degree head and blank angle is up to 45 degree for cutting material as quickly as possible .
| Thread diameter | 4.8 |
| Thread length | 42 |
| Head height | 5.5 |
| Head diameter | 10 |
| Head drive | Square / robertson |
| Pitch | 1.59 |
| Full length | 63 |
Note : all dimensions are millimeters
Carbon steel robertson square screw is quenched and tempered to ensure enough strength during installation and improve efficiency .
| Material code | 1018 |
| Tensile strengh | 539 |
| Case hardness | HV500 |
| Core hardness | HV400 |
| Density | 7.85 |
| Yiled strength | 495 |
| Ductility | 33.5 |
| Property class | 6.8 |
Finishing for Robertson square screw
| Finishing | Blue zinc |
| Standard | RoHS ( 2002/95-EC ) |
| Thickness | 3 um |
| Color | Silver |
Features for Robertson square screw
1 . Perfect flexibility and not easy to be deformed
2 . High tensile strength with fast cutting performance
3 . Effective drilling
4 . Harden material with strict dimensions
5 . Over threaded length for locking
Application
Robertson square screws are often used to secure wooden pieces or plastic parts that in industry .
RFQs
Q What material for robertson square screw ?
A Carbon steel and stainless steel
Q What finishing for Robertson square screw ?
A Popular finishing including zinc ,nickel ,tin ,chrome ,oxide and paint
Q How to ensure Robertson square screws are not broken or deformed during installation ?
A All Robertson square screws are quenched and tempered , the hardness is up to HRC 50, this is easy to be capable of request from wooden parts .