Description PART NO: FEMALE MALE FLARE O'RING RCOR- 030516 3/8" 5/16" RCOR- 0303 3/8"  3/8" RCOR- 0304 3/8" 1/2" RCOR- 0305 3/8" 5/8" RCOR- 0403 1/2" 3/8" RCOR- 0404 1/2" 1/2" RCOR- 0405 1/2" 5/8" RCOR- 0406 1/2" 3/4" RCOR- 0503 5/8" 3/8" RCOR- 0504 5/8" 1/2" RCOR- 0505 5/8" 5/8" RCOR- 0506 5/8" 3/4" RCOR- 0605 3/4" 5/8" RCOR- 0606 3/4" 3/4"