Snap Pins
Snap Pins for Simple Fastener Solutions
Snap pins, otherwise known as snapper pins or wire lock pins, are pin components that feature a pivoting spring wire attached at the head. When the pin is inserted into a mating component, the spring wire snaps around the end of the pin to lock it into place. These pins are used in a wide variety of commercial industries and are quite common in three-point hitch systems with other
three-point pins, power-take-off (PTO) assemblies, and other agricultural settings. Available in several type variations, they are essential non-threaded fasteners in applications that require quick, removable, and non-precise attachments.
Huyett offers snap pins in two different shapes: round and square. Each pin shape is also available with either single or double-wire options, with double-wire offering a more heavy-duty solution Regardless of the shape or wire thickness, each wire pin snaps into position the same way; the solid shaft is inserted into a hole in the mating component, and the wire snaps around the other end.
Application Considerations
Before using a snap pin, there are several factors to consider about the application and its environment to ensure the component's optimal performance.
- Load Requirements: How will the load affect the pin? Is it an axial or radial load? These fasteners are not recommended for applications with significant axial force.
- Access: Is the pin going to be in an accessible location? This isn't entirely necessary, but considering they are easily removable and are often used in temporary attachments, it is worth noting.
- Environmental Conditions: These fasteners will often be used outdoors in agriculture or other machinery. It is important to know if they will be exposed to corrosive conditions like rain, dirt and debris, oils and chemicals, or extreme temperatures.
Benefits
Snap pins offer a variety of benefits for relevant applications when used appropriately. They are:
- Versatile: With a simple design in various styles and sizes, these pins are not only suitable for a wide range of uses - the same pin can also be reused in different settings.
- Durable: Huyett's snap pin collection is available in 300 series stainless steel, carbon steel, and low carbon steel with several finishing options that make these components a durable solution for applications that are exposed to corrosive elements.
- Economical: These components are affordable, durable, and reusable, making them a cost-effective investment.
How to Measure a Snap Pin
When measuring these pins, there are four important measurements to note:
- Outside Diameter: The diameter of the pin shank
- Shank Length: The entire shank length from under the head to the end
- Effective Length: The shank length from under the head to the wire connection at the end of the pin
- Height: The distance between the shank and the top of the square or round wire
Can Snap Pins Be Reused?
Yes, they can typically be reused multiple times, provided they are in good condition and have not experienced excessive wear or deformation.
Clevis pins feature a head and a long shank with either one or multiple holes in it that accept hitch pin clips, like
bridge pins. The clevis pins are also inserted into a mating component and fastened on the end, they just require an extra pin to complete the connection.
Another similar pin is the
positive locking pin, which has an internal detent ball that is pressed into the shank during installation and releases to protrude beyond the shank after installation; this self-locks the pin in place.
