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Self-tapping — cut and form a thread in the material. Self-tapping screws are generally used in fastening to thin sheet metal work. The holding power lessens if the screw is removed and reapplied often. ... Also called lag bolt...
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www.lowes.com/lowes/lkn?action=howTo&p=BuyGuide/ChsFast...
www.lowes.com/lowes/lkn?action=howTo&p=BuyGuide/ChsFastnrNailScrew.html
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The main advantages of screws are that they provide more holding power, can be easily tightened to draw the items being fastened securely together, are neater in appearance if properly driven, and can be withdrawn without damaging the material. ... Square-head and hexagonal-head lag screws are always externally driven,
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www.waybuilder.net/sweethaven/BldgConst/Building01/defa...
www.waybuilder.net/sweethaven/BldgConst/Building01/default.asp?iNum=0205
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Screw - Wikipedia, the free encyclopedia
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A screw , or bolt , is a type of fastener characterized by a helical ridge, known as an external thread or just thread , wrapped around a cylinder. Some screw threads are designed to mate with...
en.wikipedia.org/wiki/Screw
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Given their tremendous holding power and variety, lag screws are often used to attach framing members. Like spiral or ribbed nails, lag screws dig deep into wood and fasten it securely. However, unlike the nails, lag screws can easily be removed and reused elsewhere.
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www.ehow.com/shop_lag-screws.html
www.ehow.com/shop_lag-screws.html
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Given their tremendous holding power and variety, lag screws are often used to attach framing members. Like spiral or ribbed nails, lag screws dig deep into wood and fasten it securely. However,...
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www.ehow.com/information_1051-p17-building-remodeling.h...
www.ehow.com/information_1051-p17-building-remodeling.html
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Lag screws, which are sometimes called lag bolts, are thick screws with coarse threads and heads that require the use of a socket wrench in the fastening process. Always use a washer so that the head of the lag screw will not sink into the lumber and thus reduce holding power.
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www.constructiontrends.com/articles/5743/1/5-Types-of-D...
www.constructiontrends.com/articles/5743/1/5-Types-of-Deck-Fasteners/Page1.html
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The holding power of lag screws is dependent on the proper size hole being provided to suit the size of the lag screw as well as the type of wood being drilled. It must not be too large or too small.
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www.glen-l.com/weblettr/webletters-8/wl60-bb-chap6-3.ht...
www.glen-l.com/weblettr/webletters-8/wl60-bb-chap6-3.html
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Check oil level in the gear box is correct and that all nuts and screws are tight. Fill the fuel tank with the correct mixture. ; 3. STARTING THE WRENCH; Place Wrench on a SOLID base and take a comfortable stance.
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www.maximpower.co.uk/eng_manual_startstop.html
www.maximpower.co.uk/eng_manual_startstop.html
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Lag Screws: For light work, lead, plastic, or fiber plugs (called anchors) can be used to hold screws. But for larger jobs and more holding power, lead expansion anchors and lag screws are used. Lag screws are heavy-duty fasteners.
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www.howstuffworks.com/screws.htm
www.howstuffworks.com/screws.htm
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