Bolt snap

Bolt snap

Swivel ring single end and double end bolt snaps
Uses	Reasonably secure temporary fastening of a light load, suitable for one handed operation.
Related items	Carabiner, Snap hook, Snap shackle, Piston hank

A bolt snap is a type of snap hook with a manually operated bolt action slide gate of medium security used to clip a light load to a ring, eye, loop or bight to temporarily secure or suspend an object. They are used for a wide variety of applications including dog leads and for clipping scuba equipment to the diving harness. A similar but more secure device used to attach sails to a stay is known as a piston hank. It differs from a snap shackle in that the load is not carried by the gate. The bolt snap must be actively operated by the user to clip or unclip, and is not easily snagged or unintentionally clipped or unclipped by pressing or bumping against the surroundings.^[1]

The most common type has a single snap hook at one end and a swivel ring at the other, but double ended bolt snaps and single ended snaps with a swivel shackle are also available. There are a few variations on the style of the hook, gate opening and swivel style.^[2] The characteristic element of the bolt snap is the bolt action gate. This is a spring loaded rod which slides longitudinally inside the body of the clip against a compression spring to open the gate of the hook, and returns to rest against the tip of the hook by the action of the spring when released.

Bolt snaps are not generally load rated, and are not used to suspend heavy loads. Most applications are in the load range where the user can lift the object to be clipped, or can hold the load manually.