Purchasing Resources for Screws

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Screws Key Terms

Screws are available in a wide array of sizes, shapes and styles that work well in a variety of industries. From specialty screws like acoustical eye lag screws, concrete screws and deck screws to general use screws such as hex cap screws, for every-day projects, screws exist to meet both simple and complex needs.

The size of a screw and the number of threads it has affects how the screw can be used to properly hold objects together. No matter which types of screws you need, learn basic screws key terms for a greater understanding of screws.

Screw thread

Screw thread pertains to the number of helical grooves found on a screw. There are different types of screw threads and each type is used for a specific application. The three main types of screw threads are coarse, fine and extra-fine threads.
Try: Efunda.com offers in-depth information on the types of screw threads.

Acoustical eye lag screws

An acoustical eye lag screw is a type of wood screw that has a fine thread and a flat end with a hole drilled inside. Used mainly to hang items from ceilings, acoustical eye lag screws are also used in wiring applications.
Try: Scrooscoop Fastener Company provides pictures and information on different types of acoustical eye lag screws.

Concrete screws

A concrete screw is a type of masonry anchor used to attach objects to concrete or brick structures. Concrete screws are made to withstand heavy loads and can be taken out and reinserted.
Try: Ace Hardware offers extensive information about the applications of concrete screws and how to use concrete screws effectively.

Slotted or flathead screws

The most common and oldest type of screw, the slotted or "flathead" screw has one lineal groove on the head of the screw where a screw driver is placed in order to turn the slotted screw.
Try: BoltDepot.com offers diagrams and information on slotted screws.

Phillips head screws

A phillips head screw offers two lineal grooves on the screw head that are perpendicular to one another to ensure a perfect fit with a phillips head screw driver.
Try: WiseGeek.com offers more information about phillips head screws.

Hex cap screws

A hex cap screw is a type of screw that has no indentation or grooves on the head and requires a wrench for applications, rather than a screwdriver. Hex cap screws resemble bolts but generally have more strength tolerance due to the thickness of the shaft.
Try: Look at B&G Manufacturing for more information on hex cap screws.

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Tips & Advice to help you make your decision on Screws

Screws, like nails and other fasteners, are so ubiquitous and exist in so many variations that to date, a comprehensive database of all the many and varied options and types that are available to use on the market currently does not exist. Of course, your needs might just be met by the local hardware store, but in many cases, this is true if you can find a local, independent hardware store that carries all the oddball items you would never find in a mass retailer.

Nevertheless, when it comes to using them in a business, even this may not be enough, as a project that you are working on may require a large quantity of screw type fasteners that are very specific. For example, they ... more

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