The 0901301118: Both the mating contact finish and the post finish are tin, with the mating surface plated to 118.1µin (3.00µm).
Termination is solder via through-hole. The contact length — post is 0.114" (2.90mm), mating length is 0.266" (6.75mm), overall contact length is 0.510" (12.95mm) — gives a standard board stand-off height for the insulator. The insulator height of 0.429" (10.90mm) means the header sits low enough for tight enclosures but still provides clearance for the latch mechanism.