Channel Fastener

1 . A fastener for mounting an object to structure having a C-shaped channel, the C-shaped channel having a slot and flanges on either side thereof, the fastener comprising:

a bolt having a head sized to pass through the channel slot; and

a washer comprising a washer hole, the washer being configured to pivot about an axis substantially perpendicular to a shank of the bolt when the bolt extends therethrough;

wherein the washer is pivotable between:

an insertion configuration, such that a bolt head and the washer may be inserted into the slot of the C-shaped channel; and

an engaging configuration, wherein the washer engages with the channel flanges, preventing withdrawal of the fastener from the channel.

2 . The fastener of claim 1 , wherein the bolt head comprises a pair of cylindrical arms extending in opposite directions to one another and perpendicular to the bolt shank; and

the washer comprises a channel having an arcuate cross-section extending across a portion of an underside;

further wherein, when the bolt extends through the washer, the bolt arms sit within the arcuate washer channel; and

the washer is able to slidably pivot, about the arms, between the insertion and engaging configurations.

3 . The fastener of claim 1 , wherein the washer hole comprises at least one sloping side wall shaped to increase an angle by which the washer is able to pivot about the bolt shank.

4 . The fastener of claim 1 , wherein a side portion of the washer is weighted; and

when the washer is resting against the bolt head and the bolt shank extends through the washer hole, the weighted side portion urges the washer to pivot towards the insertion configuration.