370-03-BLK -3 male to 1/8" NPT female

Speedflow SF370-03-BLK | -3 AN Male to 1/8" NPT Female Adapter | Black

The Speedflow SF370-03-BLK is a precision-machined -3 AN male to 1/8" NPT female adapter in black anodised finish, designed to connect -3 AN braided line systems to components with a 1/8" NPT (National Pipe Taper) female port. The 1/8" NPT thread is one of the most widely used port standards across aftermarket gauges, sensors, oil pressure fittings, and hydraulic components — making this a highly versatile adapter for performance and motorsport builds.

Product Specifications

• Part Number: SF370-03-BLK
• AN End: -3 AN male
• NPT End: 1/8" NPT female
• Finish: Black anodised
• Series: Speedflow 370 — AN Male to NPT Female Adapters
• Compatible With: Standard -3 AN male hose ends and 1/8" NPT male ports
• Barcode: 9342122011702

Applications

The SF370-03-BLK is a go-to adapter for connecting AN braided lines to NPT-ported components across a wide range of performance builds, including:

• Oil pressure gauge and sensor line connections
• Turbo oil feed and return line adaptations
• Engine oil and coolant line connections to NPT-ported components
• Fuel pressure gauge and regulator connections
• Brake and hydraulic line connections to 1/8" NPT ported valves and sensors
• Any application requiring a -3 AN to 1/8" NPT interface in a performance build

AN to NPT — Bridging Two Common Standards

AN (Army-Navy) and NPT (National Pipe Taper) are the two dominant plumbing standards in performance and motorsport builds. AN fittings use a 37° flare seat for a leak-free metal-to-metal seal, while NPT fittings use a tapered thread that seals via thread interference — typically with thread sealant or PTFE tape. The SF370-03-BLK bridges these two standards cleanly, allowing -3 AN braided lines to connect directly to the vast range of 1/8" NPT ported aftermarket components. The black anodised finish adds a premium aesthetic suited to show-quality and race builds alike.

Note: Apply appropriate thread sealant or PTFE tape to the NPT threads during installation. Sold individually.