Product Information Material: Nylon/Nickel-Plated Brass Seal: Buna-N D seal Male Thread: NPT Working Pressure: 290 PSI at ambient temperature Select a Product Part NumberMale Thread SizeTube OD 317553141/4"1/8" 317504111/8"5/32" 317556141/4"1/4" 317556183/8"1/4" 317556111/8"1/4" 317508111/8"5/16" 317562141/4"1/2" 317562221/2"1/2" 317504141/4"5/32" 317560111/8"3/8" 317560141/4"3/8" 317553081/16"1/8" 317553111/8"1/8" 317562183/8"1/2" 317560183/8"3/8" 317560221/2"3/8" 317508183/8"5/16" 317508141/4"5/16"