Abstract: A fastener element adapted for use as a bolt head, nut and the like. The element includes an operative structure adapted for removable interconnection with at least one other element of a fastener assembly to complete the assembly. A head extends from the operative structure and has an exterior surface adapted to be removably engaged by a wrench for rotation of the element. The head is hexagonal in configuration and has a projection extending from each side of the head a predetermined height less than the height of the head and being circumferentially aligned to thereby cooperate with the edges of each adjoining pair of sides of the head to form a twelve point head portion at the location of the projections while retaining a six point head portion at the remainder of the head. Thus, the fastener element can be used with either a six point or a twelve point wrench.

Abstract: A container for shipping, storing and organizing a slide tray and associated tape cassette formed from rigid material comprised of a first compartment for receipt of a slide tray and second compartment for receipt of a tape cassette. Cushioning means can be provided within the first compartment and on the inside of the top casing.