A wall hanger system for attaching an item to be hung to a vertical wall, the wall hanger system comprising a suspension washer configured to be attached to one of the wall and the item (14a-b) to be hung, the suspension washer comprising a mounting face configured to abut, along an abutment plane, said one of the wall and the item (14a-b) to be hung, and a slot engagement edge separated from, and facing, said abutment plane; and a slotted suspension fitting for cooperation with said suspension washer, the slotted suspension fitting being configured to be attached to the other of the wall and the item (14a-b) to be hung and comprising a suspension slot having a first, relatively wider, washer insertion portion configured to freely receive the slot engagement edge of the suspension washer, and a second, relatively narrower, washer engagement portion configured to engage with the slot engagement edge of the suspension washer, wherein the wall hanger system is configured to allow inserting the slot engagement edge of the suspension washer, when the suspension washer is attached to said one of the wall and the item (14a-b) to be hung, into the washer insertion portion of the suspension slot, and translating the item (14a-b) to be hung such that the slot engagement edge of the suspension washer moves along the suspension slot to the washer engagement portion of the suspension slot, thereby confining the slot engagement edge of the suspension washer in the washer engagement portion of the suspension slot so as to lock the suspension washer to the slotted suspension fitting, wherein the suspension washer comprises a mounting screw aperture for receiving a screw for mounting the suspension washer onto said one of the wall and the item (14a-b) to be hung, wherein the mounting screw aperture is an adjustment aperture shaped to allow, when screwed onto said one of the wall and the item (14a-b) to be hung, adjustment of the suspension washer along the abutment plane, characterised in that the mounting screw aperture comprises an elongate portion extending parallel to the abutment plane. a suspension washer configured to be attached to one of the wall and the item (14a-b) to be hung, the suspension washer comprising a mounting face configured to abut, along an abutment plane, said one of the wall and the item (14a-b) to be hung, and a slot engagement edge separated from, and facing, said abutment plane; and a slotted suspension fitting for cooperation with said suspension washer, the slotted suspension fitting being configured to be attached to the other of the wall and the item (14a-b) to be hung and comprising a suspension slot having a first, relatively wider, washer insertion portion configured to freely receive the slot engagement edge of the suspension washer, and a second, relatively narrower, washer engagement portion configured to engage with the slot engagement edge of the suspension washer, wherein the wall hanger system is configured to allow inserting the slot engagement edge of the suspension washer, when the suspension washer is attached to said one of the wall and the item (14a-b) to be hung, into the washer insertion portion of the suspension slot, and translating the item (14a-b) to be hung such that the slot engagement edge of the suspension washer moves along the suspension slot to the washer engagement portion of the suspension slot, thereby confining the slot engagement edge of the suspension washer in the washer engagement portion of the suspension slot so as to lock the suspension washer to the slotted suspension fitting, wherein the suspension washer comprises a mounting screw aperture for receiving a screw for mounting the suspension washer onto said one of the wall and the item (14a-b) to be hung, wherein the mounting screw aperture is an adjustment aperture shaped to allow, when screwed onto said one of the wall and the item (14a-b) to be hung, adjustment of the suspension washer along the abutment plane, characterised in that the mounting screw aperture comprises an elongate portion extending parallel to the abutment plane.