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#8 x 1/2" Drill Screw

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 Product Description

#8 x 1/2" Galvanized Drill Screw with hex/slotted head. (aka. zip screws, zippies, z-screws) These screws are used instead of banding for the closure system of aluminum and stainless steel pipe jacketing.  Insert one drill screw on the linear overlap at least every 6" of aluminum pipe jacketing.  Also use atleast one drill screw at each 3ft joint section (remember to leave atleast one expansion joint that should not be fastened).  On sealed systems, screw heads should be caulked with aluminum colored silicone caulk.

NOTE: An expansion joint is an overlap of aluminum jacketing that is not fastened to allow the pipe jacketing to flex and expand and contract with varying temperatures.

Screws come in to package types: 1,000 screw case or 100 screw bag.

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