FM25NYC25F Dixon Cast Brass Female to Male Hex Nipple - 2-1/2" Female NYC x 2-1/2" Male NST(NH)Features: Material: Cast Brass NYFD thread = 3. 031 x 8 TPI NYC thread = 3. 00 x 8 TPI Part Number Female Thread Male Thread Weight (Lbs.) FM1515NYFD 1 1 2" Female NPT 1 1 2" Male NYFD 0. 5400 FM15F15NYFD 1 1 2" Female NST(NH) 1 1 2" Male NYFD 0. 5470 FM15NYFD15F 1 1 2" Female NYFD 1 1 2" Male NST(NH) 0. 6400 FM15NYFD15T 1 1 2" Female NYFD 1 1 2" Male NPT 0. 5500 FM2525NYC 2 1 2" Female NPT 2 1 2" Male NYC 1. 4400 FM2525NYFD 2 1 2" Female NPT 2 1 2"