Archive: Oct 2017

What is a Trigger Snap?

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Education is important to us here at Henssgen Hardware, and in this article we want to shine some light on the trusty Trigger Snap. Read on to learn just exactly what a trigger snap is, what makes it unique, and what a trigger snap is used for.

You are likely more familiar with the bolt snap, which is popularly seen at the end of a dog leash. It has a button that pushes down to release the leash from the collar. You may also know the all purpose snap that looks like a carabiner and is often used for keychains.

A trigger snap is different from a bolt snap or an all purpose snap because it has a little lever, or trigger, which opens the snap. The trigger makes it easy to open and close the snap with just one hand.

It also has overlapping pieces which make for a more secure hold, rather than a bolt snap. It is very hard for anything to slip through a trigger snap. The built-in trigger mechanism will not release accidentally – only when purposeful force is applied to it, which sets it apart from a bolt snap.

Because a trigger snap also offers a more reliable holding closure, it makes more sense for certain uses.

It is often used in the fashion industry for handbags, purses, suspenders, luggage and briefcases. It is often used for camera straps, binocular straps, and other fashion or utility applications in need of good solid snaps that won’t open accidentally. Crafters love the trigger snap for key fobs, lanyards and keychains.

You can attach a strap to one end, either a fabric one that’s sewn in as in the case of a purse or handbag, a leather one for a briefcase or bag, or a webbed one in the case of a leash.

More industrial uses include awning fabrication, the marine industry for ropes and knotting, pet leash and pet collar manufacturers, horse leads, harnesses and tack changes.

Our trigger snaps all have full swivel eyes which prevent tangles and come in a variety of shapes, for different uses.

Some of them have flat eyes for use in a strap, and others come with rounded eyes for use with rope and knotting.

We offer trigger snaps in brass and die cast zinc in many different diameters for any need you may have.

Browse our trigger snap selection now!

Henssgen Hardware has a complete line of the highest quality snap hooks, clips and other rigging hardware. We carry hardware in all types of metals and galvanized steel for all types of jobs, from hauling heavy loads to quick-release panic snaps.

Visit our website today and check our online catalog.

What Does WLL Mean and Why is it Important?

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It can be confusing to decrypt all of these acronyms like SWL, NWL, WLL and MBS. But Henssgen Hardware is here for you, to educate you on terms like Working Load Limits and everything you need to know about our products.

Safe Working Load, SWL, (or Normal Working Load, NWL) is an outdated term that was used to indicate the amount of weight that a lifting device could safely carry without fear of breaking. It is a calculation of the Minimum Breaking Strength, or MBS.

The more up-to-date phrase for the term SWL is Working Load Limit, or WLL.

The specific definition for the Working Load Limit (WLL) is: The maximum mass or force which a product is authorized to support in general service when the pull is applied in-line, unless noted otherwise, with respect to the centerline of the product.

The manufacturer designates the right or approximate WLL value for each lifting device or use, and considers many factors including the applied load, the length of each rope or line, and many other factors.

It is critically important to heed this number, which is set forth by the manufacturer, when lifting with any device, including a line, rope or crane. The number is calculated by dividing the Minimum Breaking Strength (MBS) by a safety factor that is assigned to that type and use of equipment, generally ranging from four to six unless a failure of the equipment could pose a risk to life. In the event that the failure of the equipment could pose a risk to life, the safety factor is ten.

For example, if a hook has a Minimum Breaking Strength (MBS) of 1,000 pounds and a safety factor of five, then the Working Load Limit (WLL) would be 200 pounds.

The history to the change in terminology

There were legal implications to the term Safe Working Load, so USA standards phased this term out more than twenty years ago, followed by European and ISO standards just a few years afterward. This change took place because of the legal significance placed on the word ‘safe’.

The Americans and Europeans then developed a more appropriate term and definition for the maximum load capacity of a particular lifting device, agreeing to use the term Working Load Limit (WLL) for equipment such as hooks, slings and shackles.

 

In the cases of cranes, hoists and winches, the term Safe Working Load (SWL) was replaced by Manufacturer’s Rated Capacity (MRC), which is the maximum gross load which may be applied to the crane or hoist or lifting attachment while in a particular working configuration and under a particular condition of used.

Synonyms

SWL — Safe Working Load

NWL — Normal Working Load

WLL — Working Load Limit (Current term used)

Other Acronyms

MBS — Minimum Breaking Strength

MRC — Manufacturers Rated Capacity

Henssgen Hardware is committed to providing top quality products as well as all of the information you need in order to ensure the utmost in safety. Please contact us with any safety questions you may have and we’ll be happy to discuss your needs and which products are the best fit for you.