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2813364-503 — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2813364-503: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, nut_style: TUBE COUPLING, nut_height: 1.425 INCHES MINIMUM AND 1.445 INCHES MAXIMUM IN, seat_angle: 37.00 DEGREES NOMINAL, thread_class: 3B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-128-1886, 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
2813364-503
NSN: 4730-00-128-1886
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
nut_styleTUBE COUPLING
nut_height1.425 INCHES MINIMUM AND 1.445 INCHES MAXIMUM IN
seat_angle37.00 DEGREES NOMINAL
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
length_to_shoulder1.045 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN
width_across_flats2.177 INCHES MINIMUM AND 2.197 INCHES MAXIMUM IN
nominal_thread_size2.500 INCHES IN
smallest_inside_diameter2.020 INCHES MINIMUM AND 2.023 INCHES MAXIMUM IN
NSN4730-00-128-1886
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2813364-503 · 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
•
LENGTH TO SHOULDER: 1.045 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 2.177 INCHES MINIMUM AND 2.197 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SEAT ANGLE: 37.00 DEGREES NOMINAL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
NUT HEIGHT: 1.425 INCHES MINIMUM AND 1.445 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER1.045 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN
WIDTH ACROSS FLATS2.177 INCHES MINIMUM AND 2.197 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SEAT ANGLE37.00 DEGREES NOMINAL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.500 INCHES IN
NUT HEIGHT1.425 INCHES MINIMUM AND 1.445 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLETUBE COUPLING
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2813364-503?
2813364-503 is a NUT,TUBE COUPLING.
What is the NSN for 2813364-503?
2813364-503 is cataloged in the U.S. Government catalog under NSN 4730-00-128-1886. 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.