Wooden Structure Hex Head Lag Screws

Xiaoguo® supplies Wooden Structure Hex head lag screws – hex head lets you drive with a wrench, no slipping. Coarse threads bite deep, the unthreaded shank pulls joints tight. M6–M20, carbon or stainless. Want a Price list? Just ask.

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Product Description

The Wooden Structure Hex head lag screws with manufacturer XiaoGuo directly bite into the wood through their thick threads, and have extremely high tensile strength. The following are the key installation and performance parameters.

1.Guide hole diameter

Drilling holes on the base material surface in advance is the most important step for installing Wooden Structure Hex head lag screws. The size of the holes directly affects the ease of installation and the strength of the connection.

2.Installation Torque Recommendations

The traditional installation method for hexagonal wood screws is to tighten them manually without presetting a torque value. This is because the force is exerted on the wood rather than the metal thread, and forcibly setting a torque limit can easily cause damage to the wood.

Principle of actual installation:

1.When using an impact wrench, set it to the low gear position. Stop the operation immediately once the screw head is fully in contact with the surface of the workpiece.

2.After installation, the head of the screw should be tightly attached to the surface of the workpiece and should not be able to be rotated by hand.

3.Recommended drilling depth

The drilling depth should be at least equal to the effective thread length of the screw, and an additional 5–10 mm should be reserved to accommodate the dust from the drilling process.

Wooden Structure Hex head lag screws

Mon	#10	1/4	5/16	3/8	1/2	5/8	3/4	7/8	1	1-1/8	1-1/4
P	11	10	9	7	6	5	4.5	4	3.5	3.25	3.25
d max	0.199	0.26	0.324	0.388	0.515	0.642	0.768	0.895	1.022	1.149	1.277
d min	0.178	0.237	0.298	0.36	0.482	0.605	0.729	0.852	0.976	1.1	1.223
d1 max	0.122	0.177	0.228	0.268	0.374	0.473	0.582	0.686	0.784	0.892	1.017
d1 min	0.107	0.16	0.21	0.25	0.354	0.453	0.562	0.665	0.76	0.867	0.987
ds max	0.199	0.26	0.324	0.388	0.515	0.642	0.768	0.895	1.022	1.149	1.277
ds min	0.178	0.237	0.298	0.36	0.482	0.605	0.729	0.852	0.976	1.098	1.223
s max	0.281	0.438	0.5	0.562	0.75	0.938	1.125	1.312	1.5	1.688	1.875
s min	0.271	0.425	0.484	0.544	0.725	0.906	1.088	1.269	1.45	1.631	1.812
e max	0.323	0.505	0.577	0.65	0.866	1.083	1.299	1.516	1.732	1.949	2.165
e min	0.309	0.484	0.552	0.62	0.826	1.033	1.24	1.447	1.653	1.859	2.066
k max	0.14	0.188	0.235	0.268	0.364	0.444	0.524	0.604	0.7	0.78	0.876
k min	0.11	0.15	0.195	0.226	0.302	0.378	0.455	0.531	0.591	0.658	0.749
r max	0.03	0.03	0.03	0.03	0.03	0.06	0.06	0.06	0.09	0.09	0.09
r min	0.01	0.01	0.01	0.01	0.01	0.02	0.02	0.02	0.03	0.03	0.03

The impact of structure on usage

The Wooden Structure Hex head lag screws look like large "screws", but every part of their design is aimed at working with wood and bearing heavy loads.

1.Hexagonal head

The hexagonal head is a sharp-edged hexagon. When using a socket wrench to operate it, no matter how hard you try, it will not slip.

2.Coarse thread

Thread, with a particularly wide pitch and deep teeth.It is screwed into the wood. Each turn of the thread can grip a large amount of wood fibers, so it is very sturdy.

3.A short section without threads

There is a section below the head that does not have threads.It can tighten two wooden boards together.

4.Pointed tip

The tail is conical, not flat. Insert it into the pre-drilled small hole. The pointed end will automatically align, and the Wooden Structure Hex head lag screws is less likely to be twisted.

5.It is recommended to use it in combination with a washer.

The bottom of the head is flat and directly presses against the wood. Over time, the wood may develop depressions. It is best to add an iron washer to distribute the pressure evenly, so that the wood will not sink and the screws will not loosen easily.