3M™ .050 in. 4-Wall, Tripolarized Header, Straight, 40 Contacts, 81040-600400
.050" x .100", No Latch/Ejectors, 2 Row .143" Solder Tails, No Press-fit Posts, 30u" Gold Plating;TS-0261 has been discontinued and the parts listed on it have been consolidated onto TS-0253.