1) Apparel 2) Attire 3) Duds 4) Fibers 5) Garb 6) Togs 1) Article of clothing 2) BBC television docudrama 3) Clews 4) Clothing 5) Clothing, so to speak 6) Duds 7) Hardest shape for clothes 8) Helical fastener formations 9) Online comment groupings 10) Pieces of cotton 11) Screw parts 12) Slang for clothes 13) Strands of cotton 14) Tenuous supports 15) Togs 
are strands of conversation. On an email list or web forum they will be defined by messages that use the use the same subject. On blogs they are less clearly defined, but emerge through comments and trackbacks.
Threads is slang for clothes.