Quick view Pipe Nipples Model pipe nipples machined from brass pipe in various lengths and pipe sizes. The 3/16 OD (3/16-40 thread) and 1/4 OD (1/4-40 thread) pipe has a .032" wall. The 5/16 OD (1/16 NPT) has a .050" wall. Click here for information on model pipe threads. MSRP: Was: Now: $2.00 - $7.25 Choose Options
