Need to reduce the thread size of a 3/8" male threaded Scuba regulator low-pressure hose to 1/4" thread? XS Scuba's stainless-steel 3/8-24 female to 1/4" male NPT adapter can make this work. Adapter allows you to attach a standard Scuba regulator LP hose to smaller threaded requirements with a durable and corrosion resistant stainless-steel constructed adapter. This XS Scuba Adapter is designed for use with low-pressure below 200 psi (13.8 cm).