AC PERFORMANCE -6 AN Female Tube Nut and Sleeve Hardline Fitting for 5/16" OD Tubing, Black Aluminum, Pack of 2

AC PERFORMANCE High-Performance AN Hardline Fitting Set – Built for reliable, leak-proof connections. Manufactured from lightweight 6061-T6 billet aluminum, anodized finish for strength, durability and anti-corrosion. The nut connects alloy hardlines to fittings; the sleeve secures tubing and seals tightly with 37° external flares. Installation: Mount nut and sleeve first, then flare tubing with a 37° flaring tool (professional installation recommended). Package includes 2 complete sets (2 nuts + 2 sleeves). Ideal for automotive, marine, and industrial fluid line applications.

• Size: 6AN (9/16x18 UNF) tube nut and sleeve set, fits 5/16" outside diameter hardline tubing
• Material: Manufactured from lightweight 6061-T6 billet aluminum, anodized finish for strength, durability and anti-corrosion
• Function: The nut enables connection between alloy tubing and fittings; the sleeve secures the tubing to prevent loosening, forming a tight seal with the 37-degree external flare of the tubing.
• Installation: First install the tube nut and sleeve on the tubing. Then use a 37° flaring tool to flare the end of the aluminum or stainless steel hardline. Professional installation is recommended.
• Package Content: Comes with 2 tube nuts and 2 sleeves (2 complete sets total)