A lug for use in connection with a flange protector comprising a flexible impact-resistant material having a cover portion, the flange protector having multiple lugs insertable into bolt holes on the flange, wherein each lug comprises a deformable lug body having an upper end which in use is attached to a portion of the flange protector and a lower end spaced from and upper end and insertable into a bolt hole. The lug body is hollow and has an opening in a lower end, the lower end is defined by a circumferential arcuate surface terminating at the opening in the lower end, the upper end having disconnected shoulder portions on sides of the lug body, each shoulder portion having an oblique surface terminating at a lower end portion and extending partially around an upper end, the oblique surface spaced from the upper end of the lug body.