#3 TUBE SLEEVE - STEEL

The #3 TUBE SLEEVE - STEEL is a precision hydraulic and pneumatic fitting component engineered for professional fluid transfer applications. Designed for technicians and equipment operators who demand reliable connections under pressure, this tube sleeve serves as the critical compression interface between tubing and AN fittings. Whether you're assembling brake systems, fuel lines, or industrial hydraulic circuits, this steel sleeve ensures leak-free performance in demanding environments.

Manufactured by FRAGOLA, this #3 AN tube sleeve accommodates 3/16-inch diameter tubing and features zinc plating for corrosion resistance in both wet and dry climates. The steel construction provides the hardness required to bite into tubing and create a permanent compression seal when properly torqued into the fitting body. The compact profile—measuring just 2.9 x 0.4 x 3.1 inches—makes it ideal for tight engine bays and industrial installations where space is limited. This single-unit sleeve is a consumable component; proper installation technique ensures a repeatable, vibration-resistant connection.

Professional mechanics, fabricators, and hydraulic system builders rely on FRAGOLA tube sleeves for OEM-equivalent performance in automotive, aviation, and industrial sectors. Compatible with any #3 AN fitting body, this sleeve is essential for custom hose fabrication, restoration projects, and replacement work on existing fluid systems. Installation requires only a wrench and careful attention to torque specification; over-tightening can deform the tubing, while under-tightening invites leakage. Keep spare sleeves on hand, as they are often reusable only once before replacement becomes necessary.