Set Screw for A-dec® Century® Water Coolant Valve - 4-40 x 1/8 SST (A-dec® #007.010.00) Replaces 24V Volt/150 Watt bulbs in older 6300 lights A-dec® and Century® are 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.