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A55L12104 — COUPLING,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A55L12104: COUPLING,TUBE.

The COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, seat_angle: 33.0 DEGREES ALL ENDS, thread_class: 3B ALL ENDS, connection_type: THREADED INTERNAL TUBE ALL ENDS, connection_style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS, style_designator: SWIVEL, WRENCHING FACILITIES EACH END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-505-3115, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
A55L12104
NSN: 4730-01-505-3115
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
seat_angle33.0 DEGREES ALL ENDS
thread_class3B ALL ENDS
connection_typeTHREADED INTERNAL TUBE ALL ENDS
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS
special_featuresTUBE ASSEMBLY MADE FROM MS20819 0.125 IN. TUBING, FLARED TUBE FITTING SLEEVE NSN 4730-00-928-8766 AND TUBE COUPLING NUT NSN 4730-00-360-4290; TUBE DIMENSIONS: 0.125 X 0.026 X 4.000 INCHES IN
style_designatorSWIVEL, WRENCHING FACILITIES EACH END
nominal_thread_size0.125 INCHES ALL ENDS IN
nominal_overall_length4.000 INCHES IN
end_item_identificationF-14A AIRCRAFT A
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
part_name_assigned_by_controlling_agencyTUBE ASSEMBLY,OBOGS
NSN4730-01-505-3115
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A55L12104 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONNECTION STYLE: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS
•
NOMINAL OVERALL LENGTH: 4.000 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: SWIVEL, WRENCHING FACILITIES EACH END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.125 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.125 INCHES ALL ENDS IN
•
SEAT ANGLE: 33.0 DEGREES ALL ENDS
TECHNICAL CHARACTERISTICS
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS
NOMINAL OVERALL LENGTH4.000 INCHES IN
CONNECTION TYPETHREADED INTERNAL TUBE ALL ENDS
STYLE DESIGNATORSWIVEL, WRENCHING FACILITIES EACH END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.125 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.125 INCHES ALL ENDS IN
SEAT ANGLE33.0 DEGREES ALL ENDS
SPECIAL FEATURESTUBE ASSEMBLY MADE FROM MS20819 0.125 IN. TUBING, FLARED TUBE FITTING SLEEVE NSN 4730-00-928-8766 AND TUBE COUPLING NUT NSN 4730-00-360-4290; TUBE DIMENSIONS: 0.125 X 0.026 X 4.000 INCHES IN
PART NAME ASSIGNED BY CONTROLLING AGENCYTUBE ASSEMBLY,OBOGS
THREAD CLASS3B ALL ENDS
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
A55L12104-25Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A55L12104?
A55L12104 is a COUPLING,TUBE.
What parts can replace A55L12104?
There is 1 known substitute for A55L12104: A55L12104-25. Substitute compatibility should be verified for your specific system.
What is the NSN for A55L12104?
A55L12104 is cataloged in the U.S. Government catalog under NSN 4730-01-505-3115. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.