380-04 -4 Male to 1/8" NPT Male

Speedflow SF380-04 | -4 AN Male to 1/8" NPT Male Adapter | 380 Series

The Speedflow SF380-04 is a precision-machined -4 AN male to 1/8" NPT male straight adapter, part of the Speedflow 380 series AN flare to NPT steel adapters. Designed to connect -4 AN fittings to components with a 1/8" NPT female port, this adapter is an essential fitting for performance oil, fuel, turbo, and hydraulic line builds where AN braided lines interface with NPT-ported aftermarket components.

Product Specifications

• Part Number: SF380-04
• AN End: -4 AN male
• NPT End: 1/8" NPT male
• Series: Speedflow 380 — AN Flare to NPT Steel Adapters
• Compatible With: Standard -4 AN fittings and 1/8" NPT female ports
• Weight: 100g
• Barcode: 9342122003011

Applications

The SF380-04 is a highly versatile adapter suited to a wide range of performance and motorsport plumbing applications, including:

• Turbo oil feed line connections to 1/8" NPT female ported components
• Oil pressure gauge and sensor line connections
• Engine oil and coolant line connections to NPT-ported blocks and heads
• Fuel pressure gauge and regulator connections
• Hydraulic and brake line connections to 1/8" NPT female ported valves and sensors
• Any application requiring a -4 AN male to 1/8" NPT male interface

380 Series — AN Flare to NPT Steel Adapters

The Speedflow 380 series provides straight AN male to NPT male adapters in steel construction, offering robust, corrosion-resistant performance in demanding engine bay and chassis environments. Unlike the 370 series (AN to NPT female), the 380 series features a male NPT end, allowing direct connection into 1/8" NPT female ports on blocks, heads, sensors, gauges, and aftermarket components without the need for additional fittings.

AN to NPT — Installation Note

NPT fittings use a tapered thread that seals via thread interference. Always apply appropriate thread sealant or PTFE tape to the NPT male threads during installation to ensure a leak-free seal. Do not overtighten — NPT threads can crack cast components if over-torqued.

Sold individually. Compatible with standard -4 AN fittings and 1/8" NPT female ports.