There are many screws in our products such as Distribution Box, Electrical Socket and Lampholder)
An anchor is a device, normally made of metal, used to secure a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. Anchors can either be temporary or permanent. Permanent anchors are used in the creation of a mooring, and are rarely moved; a specialist service is normally needed to move or maintain them. Vessels carry one or more temporary anchors, which may be of different designs and weights.
Evolution of the anchor
The earliest anchors were probably rocks, and many rock anchors have been found dating from at least the Bronze Age. Pre-European Maori waka (canoes) used one or more hollowed stones, tied with flax ropes, as anchors. Many modern moorings still rely on a large rock as the primary element of their design. However, using pure mass to resist the forces of a storm only works well as a permanent mooring; a large enough rock would be nearly impossible to move to a new location.
The ancient Greeks used baskets of stones, large sacks filled with sand, and wooden logs filled with lead. According to Apollonius Rhodius and Stephen of Byzantium, anchors were formed of stone, and Athenaeus states that they were also sometimes made of wood. Such anchors held the vessel merely by their weight and by their friction along the bottom.
What Kinfast can provide
· Gas Concrete Anchor
Gas Concrete Anchor is used to fix gas and water pipes,cable and pipe brackets in concrete,aerated concrete,solid brick and natural stone with dense structure.The external teeth expand in the building material to ensure a high load bearing capacity.
· Heavy Duty Anchor
Heavy Duty Anchor is an internal threaded anchor for pre-position installation in non-crack concrete.During the installation,the cone is pulled into the expansion sleeve and expands it against the drill hole wall.
Post time: Aug-05-2022