Russell Performance 766123 AN Tube Sleeve Fitting

Russell Performance tube sleeves are precision-machined AN fittings designed to connect steel or aluminum hard line tubing to 37-degree AN-style fittings and adapters. Used together with a matching Russell tube nut, the tube sleeve secures the end of a hardline, creating a reliable, leak-free seal without the need for a flexible hose assembly.

Key Features:

• Precision machined for precise thread engagement and positive AN sealing
• Manufactured from lightweight aerospace-grade aluminum
• Compatible with Russell tube nuts for a complete hard line connection
• 37-degree AN sealing angle ensures a leak-free, pressure-resistant fit
• Available in anodized blue, black, or ultra-bright Endura finish options across the Russell tube sleeve lineup
• Universal application — suitable for fuel, oil, brake, and coolant hard line routing

Russell tube sleeves must be used in conjunction with a corresponding Russell tube nut. Slip the tube nut onto the hard line first, followed by the tube sleeve, then thread the nut onto the male AN fitting to secure the hardline connection. These fittings are a go-to solution for race and performance builds where flexible hose is impractical or prohibited by rules.