4″ Male Frac Fitting w/Nut & O’Ring Fig 206 One-Piece Fitting Safety Notes:400 PSI working pressure with a minimum 4:1 safety factor (hose burst: hose working pressure) is only achieved with: 4″ size requires heavy duty (HD) crimp ferrules, CF400-6CSHD through CF400-16CSHD and heavy duty stems; WARNING: Cancer and Reproductive Harm- http://www.P65Warnings.ca.gov Use:Designed to work with Dixon King Crimp Sleeves or Ferrules. Specifications:machined malleable iron stems to ASTM A47 standard Features:one-piece design eliminates leak path experienced with two-piece threaded systems; Long lasting and dependable forged hammer nut; durable and safe with reliable hose retention when crimped as specified