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Types of Door Latches

Latches are crafted in various materials and thicknesses, finishes and sizes to meet the specific requirements of engineering. For instance, engineers may select a galvanized latch to avoid corrosion and ensure durability in harsh environments.

Other specifications include the security level required for the application. Hook lock latches, for example is more secure than hasps, and might require padlocks.

Hook and Eye Latch

The hook and eye latch can be easily installed to secure gates, windows cabinets, sheds, and gates. It's also perfect for locking storm panels, porches and screens. No fancy tools are required and hooks can be screwed in manually in minutes. The screw points are sharp and will pierce into wood quickly and easily, providing stability and security.

To determine the right hook size, you must first identify the type of hook. Crosby Group (c): Look near the eye or clevis for the type of hook embossed and size. hook lock van is clearly displayed on both sides. The clevis grabber hook features the ability to connect directly to chain, whereas the eye rigging features a large, angled eye to use with synthetics or wire rope. Pewag(c) Hook type, the size in millimeters and the alloy grade is embossed on the lower surface of the hook bowl. CMCO Columbus McKinnon (c) Check out the "HA 800" or "HA 800-1000" and the size of the hook on the lower portion of the bowl, which is near the clevis.

Laclede(c), markets the Cartec chainhook. It is easy to identify by its "Cartec" raised embossed at the bottom of the bowl, and safety orange or red. Gunnebo (c) and CMCO Columbus McKinnon have their names embossed on the lower portion of hook bowl. Gunnebo also has a swivel sling hook, which is identified by an "ELD" halfway across the bowl. This hook features a wide eye that can distribute round and web slings.

Clevis Latch

A clevis latch enables the user to attach the hook of a clevis to an anchor point and also helps to prevent the hook from falling loose during the transfer of a load. Clevis latches are available in different styles, including those with spring-loaded handles or those equipped with safety locks. The latter is ideal for use with slip hooks because they ensure that the load will not fall off the hook until an inward force is applied. This feature makes slip hooks with clevis compatible with ASME B30.9 Slings standards and OSHA regulations.

A standard clevis lock has a clevis pin with the tang at one end and a shaped head at the other. These clevises, usually constructed of steel to provide strength for the latch they are usually coated with zinc, silver, or chrome. They're often plated with zinc, silver, or chromium to resist corrosion. They can also be hardened.

These latches are suitable for different purposes, from connecting chains to rigging equipment to securing loads in pickup trucks and trailers. They're also employed for heavy-duty applications, such as the securement of machinery and cranes.

Certain clevises are constructed of pieces that have been machined or folded pieces molded into them. They have a base with a hole, whether threaded or unthreaded. They can be attached to other components using the clevis bolt.

The clevis pin is typically threaded, and can be inserted into a hole which is smooth or slotted. The pin is larger than a bolt and designed to withstand heavy shearing forces and take an axial load.





Certain clevis locks are made of hardened to stand up to the strain and vibrations of harsh environments. Some are rated for overhead lifting. This means they are able to support more weight than non-hardened models. In addition to this, a latch that is hardened can be plated with a variety of different metals like nickel, silver and chromium to increase its resistance to corrosion. Paint or powder coatings can be used to enhance their appearance and give them colour.

Self-Closing Latch

The locking mechanisms of latches can be as simple or complicated as the overall design. These devices are often made of metal for durability and strength. Powder-coated or painted latches can also improve their appearance. No matter the material used in their manufacture the latches have to be strong enough to withstand the bending, shearing, and the forces of impact. The thickness of the barrels, backing plates and cams are key factors in determining if they're light-, medium or heavy duty.

The type of latch you choose is dependent on your security requirements and the kind of door or enclosure that it will be attached to. For instance, a light garden gate can be secured by hook latches, while the door to a shed that is strong requires a hasp and padlock combination.

Whether you use a self-closing latch, or not the most important thing is to make sure that it is properly closed. This reduces the chance of accidental disengagement, which could result in workplace accidents. If you're unsure how to tell whether a self-locking ring is ready for loading make sure you choose locks with an internal stop or trigger mechanism that blocks it from opening.

Another factor to consider is hands. Certain bolt, rotary, and slam designs are made specifically for left-handed or right-handed. Left-handed latches are usually positioned in the center of the latch on doors facing towards the interior. The right-handed models are positioned on the outside of doors and are used for doors that are facing away from the inside.

There are tools that bypass the Adams Rite style commercial door locking latches found on many trucks and bus. These tools enter through a cutout on the side of the commercial door next to the latch. They then reach up inside the assembly to pull on the swing bar, which opens the latch to the open position. These tools are available on the internet or in the majority of hardware stores that sell Adams Rite latches.

Keyed Latch

Latches are used to close gates and doors. There are a variety of latches. Each type has a specific function. The most common latches for doors include hook cam, clevis and hook latches as well as compression latches and rotary ones. Some latches include locking mechanisms, such as a keyed lock or panic bar. Latches are made from various materials, with metals being the most well-known. They may also be subjected to secondary procedures to enhance the quality of their surface. Finishes for latches can include painting, powder coating, and polishing.

A keyed latch is a latch that has a cylinder and requires a specific key to unlock it. The pins and tumblers inside the cylinders are aligned with the cut on the key to unlock the latch. Some locks are equipped with extra features, like anti-pick or anti-drill security.

Another type of latch is the hasp, which consists of a metal strap and a staple. The strap has a hole punched at one end that fits over the staple and the staple is attached to the other end of the strap using an adjustable hinge that allows it to swing. Other materials such as plastic and rubber are used to create latches, but metals tend to be preferred due to their formability, machinability and durability.

Metal is the most popular material used in door latches however there are exceptions. For instance, some latches are crafted from plastics in order to reduce the weight of a door or to meet other design requirements. Other latches have specialized uses, such as latches designed to be activated using the lever or handle. This allows emergency exits in building as well as other settings.

There are two kinds of door latches: knobs and levers. Levers are more common on modern designs, while knobs are typically found on older ones. Some latches are able to be opened from either side. This is a great option for doors that do not have windows. A pawl latch is a simple form of a cam latch that can be locked with one quarter-turn, or unlocked using a reverse quarter-turn. It is commonly employed on electronic enclosures as well as in trailers, RVs, buses and trucks.

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