Leggett and Platt 5 inch Black Finish Steel Riser Leg for Adjustable Beds Set of 4. Approximate Dimensions. Height: 5 in. Diameter: 1 ½ in. Attaching Bolt: M8 bolt extends approx. ½ in above top of leg. Glide: 3/16 in high located on bottom of leg. Application. This 5 in Black Finish Riser Leg will screw into the bottom of most Leggett & Platt Adjustable Beds with the M8 threaded bolt located on the top of the leg. By replacing the original legs which came with the bed, the consumer is enabled to either raise or lower the height of their bed, depending on the height of the original legs. This Black Finish Riser Leg is 5″ in height. Construction. Black Finish Steel leg provides the supportive strength of steel in a beautiful black finish. The M8 threaded bolt rises approximately 1/2″ above the top of the leg. A 3/16 in high glide is located on the bottom of the leg. Caster Attachment. There is provision for attaching a caster to the bottom of the riser leg. Casters with a 7/16in diameter x 1 1/2in H Stem will fit. Two casters which will fit are located under Related Products along the right edge of this page.