Shutter slat end retention system

An end retention system for use in a slat of a rolling shutter, the system comprising:

• a fastener, the fastener comprising a head having a width, a threaded shaft having a first diameter, and a smooth shaft having a second diameter;
• a washer, the washer having an outer diameter and comprising an aperture having an inner diameter that is at least twice the second diameter;
• and
• a guide, the guide having a profile comprising:
• a first retention fin;
• a second retention fin spaced a first distance apart from the first retention fin, wherein the first distance is less than the outer diameter of the washer;
• and
• a channel partially bounded by the first and second retention fins, wherein the channel has a width that is greater than the outer diameter of the washer;
• wherein the second diameter is greater than the first diameter, the width of the head is greater than the inner diameter of the aperture, and the washer is located in the channel.

An end retention system for a rolling shutter, the system comprising:

• a slat, the slat comprising a body having a first edge, and a screw boss receptacle have a width formed in the first edge;
• a fastener, the fastener comprising a head having a width, and a first shaft having a first diameter;
• a washer, the washer having an outer diameter and comprising an aperture having an inner diameter that is at least twice the first diameter;
• and
• a guide, the guide having a profile comprising:
• a first retention fin;
• a second retention fin spaced a first distance apart from the first retention fin, wherein the first distance is less than the outer diameter of the washer;
• and
• a channel partially bounded by the first and second retention fins, wherein the channel has a width that is greater than the outer diameter of the washer;
• wherein the first diameter is about equal to the width of the screw boss receptacle, the width of the head is greater than the inner diameter of the aperture, and the washer is located in the channel.