8.709-553.0 Coupler Twist Plug 1/2 Fpt ships factory direct right to your door. ADDITIONAL PRODUCT NOTES: 1/2'' FPT Twist Seal Coupler Plug/Nipple, 4000 PSI 8.709-553.0 model number - 26.0033.31, material type - brass, temperature - 302 Degrees, psi - 4, 000, 331309pa, 87095530,