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Bad Chinese Lag Screws -- January 19, 2012
Ive been building some 4ft by 8ft cedar raised bed boxes for my wifes garden in Lubbock Texas.  She wants a total of 20 boxes built. The design is pretty simple.  As shown below, each box is made of 6 cedar 2 x 8 boards screwed into 4 x 4 cedar corner posts.  The design called for two 5 inch long 5/16 galvanized lag screws to secure each board to the 4 x 4 post.  There are a total of 32 screws per box.
I first drill a 3/16 pilot hole into both the board and post.  I then expand the hole in the 2 x 8 boards to 5/16 so the screws can rotate in the hole. The screws only bite into the 4 x 4 posts in the corners.  The screws are run into the wood using a combination of a power drill and a hand operated ratchet wrench.  About one screw in each box breaks off inside the board.  This should not happen.  Im not exerting that much force onto these screws.  In my opinion the Chinese screws are made using very cheap soft steel.  I think their steel is inferior material for a lag screw.  It makes you wonder how many homes and buildings are constructed with these crappy fasteners.
8 Ft x 4 Ft Cedar Box        Cedar Box  
 
I have learned my lesson. 

From now on, whenever I need hardware, like nuts bolts and screws, I will do my best to find parts made in the USA. 

The stuff from China is pure crap.

Broken Lag Screws

 


Second Quarter,  2012    


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