Lag bolt DIN 571
Lag bolt DIN 571 (coach screw): specifications, materials, coatings, dimensions per GOST 11473-75. FLOK supplies fasteners for wood structure installation.
The quality of fasteners from German manufacturers has stood the test of time, so it raises no doubts among customers. Fasteners marked DIN are in high demand worldwide, confirming the quality of German-made products.
Reliable fasteners for wood
This European marking may also be used by domestic manufacturers who use German process equipment for production. At the same time, the final product must fully comply with the technical requirements of Russian GOST standards.
Lag bolts meeting DIN 571 requirements are designed for the reliable fastening of parts during the installation of wood structures.
The lag bolt, fitted with a distinctive hexagon head, requires a matching wrench for installation. Carbon steel (grades A2, A4) and brass are most commonly used as the base material for manufacturing DIN 571 screws. To improve fastener quality, steel items are given a protective coating applied by hot-dip or electroplating methods. The zinc coating reliably protects the steel from contact with air, preventing the formation of corrosion.
In terms of metric and quality characteristics, these fasteners must fully comply with the requirements of GOST 11473-75.
Economic efficiency of use
The main application area for DIN 571 screws is construction. Due to design features, lag bolts do not require additional drilling during installation. This saves time and money during construction and installation work by reducing labor costs, energy consumption for process operations, and the need to purchase additional equipment and tools.
Lag bolts are used in construction, installation and repair work of any scale. The product is versatile and is often used for working with brick or concrete. For work with a concrete or brick base, additional drilling is mandatory, and expanding plastic or nylon wall plugs are used for fastening. As the DIN 571 screw is driven in, it expands the wall plug, ensuring reliable fixation of the fastener in the base. The deeper the lag bolt is driven in, the more reliable the fastening.
How to purchase DIN 571
FLOK supplies DIN 571 screws.
Dimensions of DIN 571 lag bolts (coach screws), mm
| d | 5 | 6 | 7 | 8 | 10 | 12 | 16 | 20 | |
|---|---|---|---|---|---|---|---|---|---|
| k | 3.5 | 4 | 5 | 5.5 | 7 | 8 | 10 | 13 | |
| s | 8 | 10 | 12 | 13 | 17 | 19 | 24 | 30 | |
| L | min. | 20 | 20 | 60 | 25 | 30 | 40 | 60 | 80 |
| max. | 60 | 140 | 130 | 200 | 300 | 380 | 300 | 200 |
Designations:
d - thread diameter
k - head height of the lag bolt
s - width across flats of the head
L - screw length
b - thread length
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