A-dec 1/4 - 20 x 5/8", Zinc Socket Head Cap Screw (Pkg-25 ea) 1/4-20 x 5/8" Zinc001-089-00Included in 9053 Hardware KitReplaces 24V Volt/150 Watt bulbs in older 6300 lightsA-dec is a registered trademark of A-dec, Inc.DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec products.