JIC SECO 7 Seals

JIC SECO 7 Seals provide a reliable solution for the most persistent leaks in AN plumbing and hydraulic systems. Designed to deliver a leak-free, damage-preventing seal, these soft annealed 37° conical seals are ideal for use when connecting flared tubing to male AN fittings with standard AN tube nuts and sleeves.

Originally developed for NASA, SECO 7 Seals act like a precision crush washer on the male flare, compensating for imperfect flares, misaligned tubing, or damaged sealing faces. This ensures a consistent and dependable seal every time — even on fittings that may have minor seat damage from debris, overtightening, or manufacturing imperfections.

Compact and simple to install, these seals are an essential addition to any hydraulic, pneumatic, or fuel system maintenance kit.

Key Features

• Soft annealed 37° conical seal for AN and JIC fittings

• Solves leaks caused by misalignment or imperfect flares

• Acts as a crush washer on the male AN flare

• Prevents damage to tubing and fittings

• Compensates for worn or damaged seats

• Originally developed for NASA applications

• Sold individually – ideal to keep spares in your toolbox

Typical Applications

• Hydraulic and pneumatic systems

• Fuel and oil lines

• Aerospace, automotive, marine, and industrial plumbing

• Field maintenance and system repairs

Keep a few in your kit — ready for the unexpected.