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[China]
Address: Rongda Industrial Park, Xinhua Road, Wangting Town, Suzhou City, China
Contact name:
Suzhou Crever Fastener Co., Ltd |
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Hexagon Head Coach 316 Stainless Steel Lag Bolts Screw M10 In Construction Projects
1.Descriptions:
Hex head Wood Screw also called Coach screws are heavy duty fasteners specially designed for fastening metal pieces with timber and also to fasten heavy timbers. These types of screws are also known as ‘lag bolts’ or ‘lag screws’.
These screws feature a square or hexagonal-shaped head, specifically engineered to be easily used with any plier, wrench or spanner. These metal pieces are available in a huge range of sizes, ranging from the very small ones ideal for furniture and easily assembled by the consumer to extremely huge ones, which are used in large scale construction projects.
These specially designed fasteners comprise of an outwardly threaded cylindrical shaft, which is tapered at one end and its head protruding out at the other end.
When such screws are inserted into timber, the threads dig in into the wood and their heads prevent the rivets from slipping all the way through, due to the compression which is simultaneously created.
Lag screws are also only available with hex heads while more common wood and sheet metal screws are available in multiple head types. With the sole option of a hex head, installation of the screw will require a nut driver or ratchet. A right driver bit and a power drill can be used to finish the tightening of the lag screw. The hex head lag screw is designed that way since hex headed fasteners are made to hold up in applications where a lot of torque is necessary. Lag screws have sharp lead thread points and are available in Steel/Zinc, Stainless Steel, and Steel/Hot Dip Galvanized.
2. Specifications:
1. Name: DIN571 hex head wood screw, Hex Lag screws
2. Grade: C10B21, C1022, SUS201,SUS410,SUS304,SUS316,A2-70,A2-80,A4-80
3. Size: M5x25--M20x400mm
4. Standard: DIN96 DIN97,DIN95, DIN7995, DIN7997, DIN571
5. Certification: ISO9001, SGS, CTI, ROHS
6. Drive: philips, pozi, socket, hex, square, solloted, combined
7. Packing: bulk packing, small box packing, plastic box packing
8. Payment Terms: T/T
9. Main market: USA, Europe, Chile, Dubai, Russia, Africa
3. Drawing Technical Data:
| Thread | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 16 | 20 | ||
| ds | nominal size max. | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 16 | 20 | |
| min. | 3,52 | 4,52 | 5,52 | 6,42 | 7,42 | 9,42 | 11,3 | 15,3 | 19,3 | ||
| da | max. | 5 | 6 | 7,2 | 8,2 | 10,2 | 12,2 | 15,2 | 19,2 | 24,4 | |
| k | nominal size | 2,8 | 3,5 | 4 | 5 | 5,5 | 7 | 8 | 10 | 13 | |
| max. | 3,1 | 3,88 | 4,38 | 5,38 | 5,88 | 7,45 | 8,45 | 10,45 | 13,9 | ||
| min. | 2,5 | 3,13 | 3,63 | 4,63 | 5,13 | 6,55 | 7,55 | 9,55 | 12,1 | ||
| s | nominal size | 7 | 8 | 10 | 12 | 13 | 17 | 19 | 24 | 30 | |
| max. | 7 | 8 | 10 | 12 | 13 | 17 | 19 | 24 | 30 | ||
| min. | 6,64 | 7,64 | 9,64 | 11,57 | 12,57 | 16,57 | 18,48 | 23,16 | 29,16 | ||
| e | min. | 7,5 | 8,63 | 10,89 | 13,07 | 14,2 | 18,72 | 20,88 | 26,17 | 32,95 | |
| Bolt Diameter | D | F | H | Threads Per Inch | Thread Dimension | ||||
| Body Diameter | Width Across Flats | Head Height | Pitch | TF | TD | TR | |||
| Max | Min | Flat At Root | Depth of Thread | Root Diameter | |||||
| 1⁄2 | 0.515 | 0.482 | 3⁄4 | 11⁄32 | 6 | 0.167 | 0.072 | 0.064 | 0.371 |
| 5⁄8 | 0.642 | 0.605 | 15⁄16 | 27⁄64 | 5 | 0.2 | 0.086 | 0.077 | 0.471 |
| 3⁄4 | 0.768 | 0.729 | 11⁄8 | 1⁄2 | 41⁄2 | 0.222 | 0.096 | 0.085 | 0.579 |
| 7⁄8 | 0.895 | 0.852 | 15⁄16 | 37⁄64 | 4 | 0.25 | 0.108 | 0.096 | 0.683 |
| 1 | 1.022 | 0.976 | 11⁄2 | 43⁄64 | 31⁄2 | 0.286 | 0.123 | 0.11 | 0.78 |
| 11⁄8 | 1.149 | 1.098 | 111⁄16 | 3⁄4 | 31⁄4 | 0.308 | 0.133 | 0.119 | 0.887 |
| 11⁄4 | 1.277 | 1.223 | 17⁄8 | 27⁄32 | 31⁄4 | 0.308 | 0.133 | 0.119 | 1.012 |
| 13⁄8 | 1.404 | 1.346 | 21⁄16 | 29⁄32 | 3 | 0.333 | 0.143 | 0.128 | 1.119 |
| 11⁄2 | 1.531 | 1.469 | 21⁄4 | 1 | 3 | 0.333 | 0.143 | 0.128 | 1.244 |
| Dimensions per ASME B18.2.1 2003 | |||||||||
4. Feasures:
Lag screw or Coach screws are fastened into wood with a spanner or socket
These rivets are ideal for fastening into wood and are also used with wall plug in all masonry work
Made up of galvanized carbon steel
Features coarse thread and hexagon head
Features sharp gimlet point for easy penetration
Length ranges from 20 mm to 400 mm
Thickness varies from 5 mm to 12 mm
Most of these fasteners feature smooth shank
5. Product uses:
The Lag screw/coach screws are widely used at critical joins in construction projects, due to their highly sturdy nature. These fasteners are often more advanced than nails for construction projects, as they can be easily removed and reused later.
These screws are preferred for joints because of their heavy duty characteristic and they even render additional support through the use of metal flanges, whenever needed.
These fasteners are also used for fixing into timber, as their sharp points enable easy and quick installation, however pre-drilling is required in some cases.
When using such screws, it is always important to make sure that you’re using the correct wrench or spanner so as to prevent the head of the screw from getting damaged during installation. You should check-out the size of a wrench or spanner whichever you’re using, plus, you should also measure the flat ends.
And if you’re using these fasteners in fastening wooden pieces or in other cases where the rivet has to pass through the surface then you should use a washer with the screw so that the head won’t be sucked into the surface.
6. More Pictures:
Hexagon wood screws, Hex Lag screws, coach screws
