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Address: NO.12 HUANGHE RD ,HUANGJINAG , DONGGUAN, GD,CHINA
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VEDALI HARDWARE CO., LTD |
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A2 Stainless Steel Hex Head Screws for Coach Self Tapping Fastener
Coach screws are named lag bolt or lag screw , they have a hex head to be operated by a spanner or wrench , coach screw sharp point with threads will bites wooden material when it is installed and the hex head to the surface of wooden parts .
Coach screws are used for a joint between wooden parts or wooden parts with metal parts , before drill coach screw into wooden material , a pre-drilling hole is needed for leading purpose .
Coach Screws Specification
DIN 571
| d | ds | k | s | p | L |
| 4 | 4 | 2.8 | 7 | 1.8 | 16-200 |
| 5 | 5 | 3.5 | 8 | 2.2 | |
| 6 | 6 | 4 | 10 | 2.6 | |
| 8 | 8 | 5.5 | 13 | 3.6 | |
| 10 | 10 | 7 | 17 | 4.5 | |
| 12 | 12 | 8 | 19 | 5 | |
| 16 | 16 | 10 | 24 | 6 | |
| 20 | 20 | 13 | 30 | 7 |
Material for Coach Screws
Carbon steel : 1008 , 1010 , 1018 , 1022 , 1035 , 1045 , SCM 435
And optional materials as
stainless steel SUS 201 , SUS303 , SUS 304 ,SUS 316 , SUS 416 ,SUS 430 and SUS 420 .
Aluminum : 2024 , 6061 and 7075
Brass : CuZn35 , CuZn37 , CuZn40 , CuZn37Pb1 and CuZn39Pb1
Finish for Coach Screws
| Finish | Colors | Thickness | Characteristics |
| Zinc | Blue ,White ,Black ,Yellow | 5-107μm | Bright and smooth surface ,corrosion resistance |
| Nickel | Silver | 1～3μm | Wear resistance ,bright appearance , anti-corrosion |
| Polishing | Silver | 0.01mm ( reference ) | Improving brightness of surface |
| Tin | Silver | 0.13～1.27μm | Good ductility ,corrosion resistance ,lower melting point ,eco-friendly ,brightness |
| Brass | Copper | 5gm～8gm | Good dispersibility ,Bright appearance |
| Dacromet | Grey | 4-8μm | High corrosion resistance , No hydrogen embrittlement ,Heat resistance ,Easy to plated more ,eco-friendly |
| Chrome | Silver white | 0．25～0．5μm | Harden surface ,Bright surface ,Heat resistance ,Wear resistance Corrosion resistance and eco-friendly
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Applications for Coach Screws
Coach screws are used for wooden parts of furniture or buliding etc mainly secure or fix metal parts with wooden parts ..
Features for Coach Screws
◆ Partial threads
◆ High torsinal strength
◆ Harden material
◆ Good drilling point
◆ Heavy Loading
◆ Eco-friendly
Hex wood screws with partial threads
