Another popular type of lock pin is the coiled pin.
It is recognized by the 2-1/4 coiled cross -section. With installation,
the compression begins at the outer edge and move through the
coils toward the center, distributing stress equally. The coiled
act as shock absorbers allowing the pin to flex, dampening the
impact and protecting the walls.
It is critical to choose the correct "duty"
pin. If the pin is too strong, it will not flex as required and
wall damage could result. There are three types or "duty"
pins to choose from: HEAVY, LIGHT AND STANDARD duty to meet most
requirements. Because of the flat cut chamfered ends, these pins
can be reused several times. They require less pressure to insert
than a spring pin and can be a benefit when a pin is needed in
a thin section or in fragile materials. They are available in
1070 carbon steel, 6150 alloy steel in larger diameters, 420 stainless
steel, and non-magnetic 302 stainless steel.