MS21906D5

CROSS, FLARELESS TUB
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About this product
The MS21906D5 is a factory-new, flareless cross fitting designed to join four straight tubing runs at a single junction. Supplied with traceable paperwork, it is manufactured to aerospace workmanship expectations and intended for certified maintenance. The fitting provides a compact, serviceable junction that preserves tubing continuity and routing without requiring flared tube ends.
MS21906D5 Datasheet
Lead Time: Stock
Certification: TRACE
UOM: EA
8130/EASA Eligible: Yes
PRODUCT DESCRIPTION

MS21906D5

  • Flareless connection design: Joins tubing without the need to form a flare, simplifying field installations and replacements.

  • Four-way cross configuration: Provides a compact junction to distribute fluid or pneumatic lines in tight harness runs.

  • Aerospace workmanship: Manufactured to controlled quality standards for consistent dimensional fit and sealing function.

  • Traceable supply: Supplied with trace paperwork suitable for inclusion in maintenance records and audits.


  • Provides a neat four-way junction in hydraulic control or service lines where the AMM specifies a cross fitting.

  • Routes pneumatic control or bleed lines in ECS/pressurization systems within confined equipment bays.

  • Joins sensor or pressure-sensing tubing runs on test benches and in avionics racks for coordinated sampling.

  • Used in shop repairs to create a compact union between small oil/feed lines during bench overhaul.


  • What does “flareless” mean for this fitting?

Flareless fittings use ferrules or compression elements to seal the tube without forming a mechanical flare on the tube end, simplifying field work and keeping tube strength intact.

  • How should I install it?

Follow the aircraft AMM and the fitting manufacturer’s installation procedure: clean tube ends, fit the correct ferrules, insert tubing fully, and tighten to the specified torque or number of turns where required.

  • How do I check for leaks after fitting?

Perform the AMM leak or pressure test for the system, inspect each junction leg visually for seepage, and confirm system pressure and function per the maintenance procedure.


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