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Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...
Inserts are pins, bolts, screws, joints and other structures that are used to transfer localized loads to a composite panel or to join two composite panels together. Metallic inserts are commonly used in the aerospace and marine industries to attach objects to sandwich composite panels.
Tapcon screws are a popular anchor that stands for self tapping (self threading) concrete screw. Larger diameter screws are referred to as LDT's. This type of fastener requires a pre-drilled hole—using a Tapcon drillbit—and are then screwed into the hole using a standard hex or phillips bit. These screws are often blue, white, or stainless ...
He had originally established his company, the P.L. Robertson Manufacturing Company, in Hamilton, Ontario in 1907. [3] [4] Robertson then relocated the company to produce his screws in Milton, Ontario, the following year after the town had given a $10,000 loan for the factory's local establishment.
Würth was founded by Adolf Würth (1909–1954), [6] for the purpose of selling screws in 1945 in Künzelsau (hence the company logo, which consists of the family name and a W of two screw heads with cylindrical and round heads). After the death of Adolf Würth, his son Reinhold Würth took over in 1954 at the age of 19 with his mother Alma ...
After failing to interest manufacturers, Thompson sold his self-centering design to Phillips in 1935. [4] Phillips formed the Phillips Screw Company in 1934. After refining the design (U.S. Patent #2,046,343, U.S. Patents #2,046,837 to 2,046,840) for the American Screw Company of Providence, Rhode Island, Phillips succeeded in bringing the design to industrial manufacturing and promoting its ...