Hole plug

A hole plug, comprising:

• a tubular outer periphery wall portion for insertion into a round tube portion of a burring hole formed in an attachment member;
• an annular flange portion that protrudes toward a radial direction outer side of the outer periphery wall portion, from an end portion side of the outer periphery wall portion at an opposite side from an insertion direction side of the outer periphery wall portion, the flange portion covering a surrounding portion of the burring hole;
• a pawl portion that projects toward the radial direction outer side from the outer periphery wall portion, the pawl portion engaging with a distal end portion of the round tube portion;
• a closure portion that extends between inner sides of the outer periphery wall portion, the closure portion closing off the burring hole;
• and
• an abutting portion provided at the outer periphery wall portion, the abutting portion overlapping with a periphery edge portion of the burring hole as seen in the insertion direction, and the abutting portion configured to abut the periphery edge portion;
• wherein:
• an outer side protruding portion is a portion formed by an intermediate portion, in the insertion direction, of the outer periphery wall portion being inflected partway along the intermediate portion, the outer side protruding portion protruding along the radial direction toward the radial direction outer side but not diagonally with respect to the radial direction,
• a distal end portion side of the outer side protruding portion configures the abutting portion, and
• when the outer periphery wall portion is inserted into the burring hole, the abutting portion abuts on the peripheral edge portion to limit the movement of the outer periphery wall portion in the insertion direction, and wherein:
• the closure portion is provided with an annular inner side protruding portion, an annular inner periphery wall portion, and a face plate portion;
• the inner side protruding portion protrudes toward the radial direction inner side from the end portion at the insertion direction side of the outer periphery wall portion,
• the inner periphery wall portion extends from an inner periphery end portion of the inner side protruding portion to the opposite side from the insertion direction, and
• the face plate portion closes the end portion at the opposite side of the inner periphery wall portion from a side in the insertion direction,
• wherein reinforcing ribs that connect the inner periphery wall portion with the outer periphery wall portion are formed between the inner periphery wall portion and the outer periphery wall portion, and the face plate portion is on an insertion direction side of the outer side protruding portion.