Slide fastener

A slide fastener comprising:

• a first fastener stringer including a first fastener tape, a first fastener element and a front stop, the first fastener element secured to a side edge of the first fastener tape;
• a second fastener stringer including a second fastener tape and a second fastener element, the second fastener element secured to a side edge of the second fastener tape, the second fastener element engageable with the first fastener element;
• and
• a slider that moves forward and rearward to engage and disengage the first and second fastener elements, the slider including an upper wing, a lower wing, an interconnection pillar interconnecting the upper and lower wings, and at least a pair of flanges protruded at left and right side edges of the upper wing or the lower wing,
• the front stop including:
• an insert inserted into the slider;
• a stop portion with upper and lower protrusions respectively protruded upward and downward to touch the upper and lower wings so as to block forward movement of the slider;
• a first side surface that faces the interconnection pillar as the front stop blocks forward movement of the slider, the first side surface including a rear region and a front region;
• and
• a second side surface that faces the flange as the front stop blocks forward movement of the slider, the second side surface positioned opposite to the first side surface, the second side surface including a rear region and a front region, wherein
• the front region of the second side surface is inclined or bulged away from the first side surface to form a predetermined angle with the rear region of the second side surface, and
• the front stop is oriented, when forward movement of the slider is blocked by the stop portion, to allow a contact portion included in the front region of the second side surface to touch an inner wall surface of the flange and to allow at least part of the rear region of the first side surface to touch a wall surface of the interconnection pillar.