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An Easy-To-Follow Guide To Hook Lock Latch
Types of Door Latches

Latches are crafted in various materials, finishes and thicknesses to meet specific engineering specifications. For instance, engineers may select a galvanized latch to prevent corrosion and maintain the durability even in harsh environments.

Other specifications cover the security level required for a particular application. A hook lock latch , for example, is more secure than hasps, and may require a padlock.

Hook and Eye Latch

The hook and eye latch is an easy-to-install way to lock gates windows, doors, cabinets and sheds. It's also ideal for securing storm panels, porches and screens. There aren't any fancy tools needed and hooks can be screwed in manually within a matter of minutes. The sharp screw points bite into wood easily and efficiently to provide extra security and stability.

To determine the correct hook size, first determine the type of hook. Crosby Group(c) Look for the type of hook and size embossed close to the eye or clevis of the hook. The size in inches is on one side, and the size in mm is on the other. The clevis grabber hook comes with a clevis to attach directly to chain, whereas the eye rigging has an eye with a large, angled angle for use with synthetics or wire rope. Pewag(c) is the hook type size (in mm) and grade of the alloy are engraved on the lower portion of the hook bowl. CMCO Columbus McKinnon (c) Take a look at the "HA 800" or "HA 800-1000" as well as the size of the hook on the lower part of the bowl, near the clevis.

Laclede(c) is the marketer of the Cartec chain hook. It is easy to identify because it features "Cartec" raised embossed at the bowl's bottom and safety orange or red. Gunnebo (c) and CMCO Columbus McKinnon have their names embossed in the lower part of the hook bowl. Additionally, Gunnebo has a swivel hook that's identified by an "ELD" mark halfway across the bowl. The hook has a large eye that can distribute webs and round slings.

Clevis Latch

A clevis lock allows users to secure a clevis onto an anchor, and it prevents the hook from slipping off during the transfer of loads. Clevis latches can be found in a variety of designs, including ones that have spring-loaded handles and those with a safety lock. This latter is perfect for use with slip hooks, as they guarantee that the load doesn't fall off the hook unless an upward force is applied. This makes slip hooks with clevis compatible with ASME B30.9 Slings standards and OSHA regulations.

A typical clevis latch has a clevis pin and tang at one end, and a head that is formed on the other. These clevises, usually made of steel to provide strength for the latch and are usually plated with zinc, silver, or chrome. To prevent corrosion, they're typically coated with zinc, chrome, or silver. They can also be hardened.

These latches can be used for diverse purposes including connecting chains to the rigging equipment, to securing loads in trailers and pickup trucks. These latches are also used in heavy duty applications such as securing cranes and machinery.

Some clevises are made from pieces that have been machined and others are made of folded pieces molded into them. They are built with a base that has a hole, whether threaded or not. They can be welded to other components using the clevis bolt.

The clevis pin is threaded to fit into an open or slotted hole. The pin is larger than a bolt and is designed to withstand massive shearing forces and take an axial load.

A lot of clevis latches are made to withstand the strain and vibration of use in harsh environments. Some are rated for overhead lifting. This means they are able to support more weight than models that are not hardened. In addition to this, a latch that is hardened can be coated with a variety of different metals including nickel, silver and chromium in order to enhance its resistance to corrosion. They can also be powder coated or painted to add color and improve their appearance.

Self-Closing Lock

The locking mechanism can be as complicated or simple as the overall design. Often, these devices are made of metals to ensure strength and durability. The use of painted or powder-coated latches can also enhance their appearance. Whatever the material employed to make them the latches have to be strong enough to withstand being bent, sheared and impacts. The thickness of the barrels, backing plates, and cams are key factors in determining if they're light-, medium or heavy-duty.

You should choose the latch based on both your security requirements and the kind of door or enclosure that you intend to attach it to. For example, a lightweight garden gate can be secured with hook latches, while an imposing shed door requires a padlock and hasp combination.


If you are using a self-closing latch or no the most important thing is to ensure that it is properly closed. This minimizes the risk of a mishap that could lead work-site injuries. If you're not sure what to look for to determine if a self-locking hook is ready for loading make sure you choose locks with an internal stop or trigger mechanism that stops it from opening.

Another factor to consider is handiness. Some designs of bolt, rotary, and slam latches are made to be either left-handed or right-handed. Left-handed models are usually placed in the middle of the latch and are utilized on doors that are facing inward towards the interior of the building. The right-handed models are put on the outside of doors and are designed for doors that are facing away from the interior.

There are also tools that work around the Adams Rite style commercial door locking latches found on many trucks and buses. These devices enter the assembly through a cutout in the side of the door close to the latch. They then pull the swing bar to pull the latch back. You can locate these tools on the internet or in most hardware stores that carry Adams Rite latch products.

Keyed Latch

Latches are used to keep gates and doors closed. There are a variety of latches. Each one has a distinct purpose. Common door latches include hook, clevis, cam, compression, and rotary latches. Some latches include locking mechanisms, like a keyed lock or panic bar. Metals are the most common material for latches but other materials can be employed. They can also be subjected to further processes in order to improve the quality of their surface. Finishes for latches can include painting, powder coating, and polishing.

A keyed latch has an cylinder that requires the use of a key to unlock. 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, such as anti-pick or antidrill protection.

Another type of latch is the hasp made up of a metal strap and a staple. The staple is attached using a hinge to the other end of a strap that has a slot in it. Other materials such as rubber and plastic can be utilized to create latches but metals tend to be more popular due to their shapeability, machinability, and the strength.

Door latches are usually made from metals, however there are exceptions. Some latches, for example, are made of plastic to reduce the weight or meet other design requirements. Other latches have special uses for instance, latches that are designed to be activated with the lever or handle. This permits emergency exits to be made in buildings and other environments.

There are two main types of door latches, which are levers and knobs. Levers are more common on modern designs, while knobs are typically found on older models. Certain latches can be reversed, which means they can be opened from either side, which is particularly useful for interior doors where there are no windows. A pawl latch is a simple type of cam latch that can be locked with the quarter-turn and unlocked using a reverse quarter-turn. It is commonly utilized on electronic enclosures, as well as in RVs, trailers, buses and trucks.

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