Size from 1/8” to 1” 316 stainless steel Straight fittings are machined from bar stock; shaped fittings are manufactured from forgings for strength. All the pipe fittings are cleaned to remove oil, grease and residue in process of production. It is recommends a pipe-thread sealant on all NPT male thread. Teflon tape is the most effective sealing method.   ADAPTER HEX.COUPLING HEX.LONG NIPPLE       HEX.NIPPEL HEX. REDUCING NIPPLE REDUCING ADAPTER             HEX.REDUCING COUPLING REDUCLING BUSHING PIPE PLUG   Fitting Type Designator Identifier Description HN Hex Nipple HLN Hex Long Nipple HRN Hex Reducing Nipple A Adapter RA Reducing Adapter RB Reducing Bushing HC Hex Coupling HRC Hex Reducing Coupling PP Pipe Plug   Pipe Thread Designator Nominal Size 1/ 8” 1/ 4” 3/ 8” 1/ 2” 3/ 4” 1” NPT 2 4 6 8 12 16