>Can't believe I'm asking basic questions about putting a bookshelf together.
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>I bought a bookshelf and was trying to put it together last night. Unfortunately, one of the pieces (a hidden cam - one of those little circular screws you push into a board and then slide a cam dowel on the side of it) is missing.
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>For anyone who knows more about basic hardware than I do (i.e. 99% of the population), are hidden cam screws pretty standard/universal, where I could just go into a local Walmart....or are they very specific and I need to order one from the company that makes the bookshelf?
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>I guess this is my punishment for buying a cheap bookshelf at K-Mart. I should have known better

Try Lowes - the have a large section of drawers in the hardware aisle that contain hundreds of specialty fasteners.