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AN6289K20 — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AN6289K20: LOCKNUT,TUBE FITTING.

The LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.438 INCHES NOMINAL IN, thread_class: 3B, thread_series: UN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-833-7656, 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
AN6289K20
NSN: 4730-00-833-7656
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.438 INCHES NOMINAL IN
thread_class3B
thread_seriesUN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN
nominal_thread_size1.625 INCHES IN
packing_recess_depth0.049 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
packing_recess_diameter1.849 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN
thread_quantity_per_inch12
NSN4730-00-833-7656
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN6289K20 · 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
•
WIDTH ACROSS FLATS: 1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN
•
PACKING RECESS DIAMETER: 1.849 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN
•
THREAD SERIES: UN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.625 INCHES IN
•
NUT HEIGHT: 0.438 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NUT STYLE: TUBE FITTING LOCKNUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN
PACKING RECESS DIAMETER1.849 INCHES MINIMUM AND 1.859 INCHES MAXIMUM IN
THREAD SERIESUN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.625 INCHES IN
NUT HEIGHT0.438 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLETUBE FITTING LOCKNUT
THREAD CLASS3B
THREAD QUANTITY PER INCH12
SUBSTITUTES & CROSS-REFERENCES 5
SAE-AS4841Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
4730PL2094303Reference document
Same NSN cross-reference
Reference document — Informative reference only
SAE AS54841Reference document
Same NSN cross-reference
Reference document — Secondary reference
157618230Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SAE AS5179Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN6289K20?
AN6289K20 is a LOCKNUT,TUBE FITTING.
What parts can replace AN6289K20?
There are 5 known substitutes for AN6289K20: SAE-AS4841, 4730PL2094303, SAE AS54841 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN6289K20?
AN6289K20 is cataloged in the U.S. Government catalog under NSN 4730-00-833-7656. 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.