August 14, 2015: AT&T joins T-Mobile and Verizon in offering new contract free plans based on monthly data caps. The carrier is offering five tiers, starting with 300MB of data for $20 per month, then escalating to 2GB for $30, 5GB for $50, 15GB for $100 (probably the best deal), and 20GB for $140.
The Hub and Spigot are two types of fitting on either end of a pipe. At one end you have the Hub (Socket) fitting; which is a female end of a fitting designed to accept pipe or a SPIGOT connector. At the other end you have the Spigot fitting; which is a male end of a fitting designed to be used inside another fittings Socket (or Hub) end.
These cavities are usually the coolant passages. Holes are designed into the casting to support internal sand forms, and to facilitate the removal of the sand after the casting has cooled. Core plugs are usually thin metal cups press fitted into the casting holes, but may be made of rubber or other materials. In some high-performance engines the core plugs are large diameter cast metal threaded pipe plugs. Core plugs can often be a source of leaks due to corrosion caused by cooling system water.