PartsTable
Technical Data Sheet
Download PDF

C31645AB — COUPLING BODY,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

C31645AB: COUPLING BODY,TUBE.

The COUPLING BODY,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, thread_size: 5-3/8-12, thread_class: 3A A, overall_length: 1.760 INCHES NOMINAL IN, outside_diameter: 5.710 INCHES NOMINAL IN, special_features: BLACK. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-358-6412, 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
C31645AB
NSN: 4730-01-358-6412
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
materialALUMINUM ALLOY 2024
thread_size5-3/8-12
thread_class3A A
overall_length1.760 INCHES NOMINAL IN
outside_diameter5.710 INCHES NOMINAL IN
special_featuresBLACK
style_designatorFLEXIBLE COUPLING BODY
thread_directionRIGHT-HAND
surface_treatmentANODIZE
screw_thread_series_designatorUN
working_pressure_and_service_type125.0 POUNDS PER SQUARE INCH (PSI) NOMINAL JET FUEL LBS
tube_outside_diameter_for_which_designed4.500 INCHES NOMINAL IN
NSN4730-01-358-6412
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C31645AB · 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 4.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLEXIBLE COUPLING BODY
•
OUTSIDE DIAMETER: 5.710 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SIZE: 5-3/8-12
•
SCREW THREAD SERIES DESIGNATOR: UN
TECHNICAL CHARACTERISTICS
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED4.500 INCHES NOMINAL IN
STYLE DESIGNATORFLEXIBLE COUPLING BODY
OVERALL LENGTH1.760 INCHES NOMINAL IN
OUTSIDE DIAMETER5.710 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD SIZE5-3/8-12
SPECIAL FEATURESBLACK
SCREW THREAD SERIES DESIGNATORUN
SURFACE TREATMENTANODIZE
THREAD CLASS3A A
SUBSTITUTES & CROSS-REFERENCES 2
7D0260Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
7D0260-72Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy C31645AB?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is C31645AB?
C31645AB is a COUPLING BODY,TUBE.
What parts can replace C31645AB?
There are 2 known substitutes for C31645AB: 7D0260, 7D0260-72. Substitute compatibility should be verified for your specific system.
What is the NSN for C31645AB?
C31645AB is cataloged in the U.S. Government catalog under NSN 4730-01-358-6412. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — C31645AB

✓ 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.