The XS Scuba AC915 Stainless Steel Adapter (3/8” to 1/4” NPT Male) is a durable, corrosion-resistant fitting designed for divers and technicians who need a reliable connection between common NPT thread sizes used in scuba and compressed air setups. Built from stainless steel, this adapter is an excellent choice for harsh marine environments where strength and rust resistance matter.

Whether you’re assembling a regulator-related accessory setup, configuring air tools, or building out a custom fill/utility configuration, the AC915 helps you adapt thread sizes cleanly and securely with a professional-grade fit.

Key Features & Benefits

Stainless steel construction for excellent corrosion resistance in saltwater environments

Adapts 3/8” to 1/4” NPT (male) thread sizing for versatile compatibility

Ideal for scuba, dive shop service benches, compressor/fill station setups, and air system builds

Built for dependable sealing and long-term durability

Common Uses

Adapting thread sizes on compressed air accessories

Scuba service and rigging applications

Fill station / compressor plumbing configurations

Shop and field use where rugged fittings are required

Note: NPT threads are tapered and typically require appropriate thread sealant (as applicable) to ensure a proper seal. Always verify thread sizing and application requirements before installation.