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6559060 ITEM-F79 — NUT,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6559060 ITEM-F79: NUT,UNION.

The NUT,UNION is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.812 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, shoulder_width: 0.160 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-329-1129, 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
6559060 ITEM-F79
NSN: 4730-01-329-1129
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
nut_styleHEXAGON
nut_height0.812 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
shoulder_width0.160 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats2.000 INCHES NOMINAL IN
nominal_thread_size1.625 INCHES IN
shoulder_step_width0.152 INCHES NOMINAL IN
shoulder_seat_diameter1.625 INCHES NOMINAL IN
smallest_inside_diameter1.320 INCHES NOMINAL IN
NSN4730-01-329-1129
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6559060 ITEM-F79 · 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: 2.000 INCHES NOMINAL IN
•
SHOULDER STEP WIDTH: 0.152 INCHES NOMINAL IN
•
SHOULDER WIDTH: 0.160 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.625 INCHES IN
•
NUT HEIGHT: 0.812 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.000 INCHES NOMINAL IN
SHOULDER STEP WIDTH0.152 INCHES NOMINAL IN
SHOULDER WIDTH0.160 INCHES NOMINAL IN
THREAD SERIESUN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.625 INCHES IN
NUT HEIGHT0.812 INCHES NOMINAL IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH16
SUBSTITUTES & CROSS-REFERENCES 2
1385946Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
803-1385946 PC-8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6559060 ITEM-F79?
6559060 ITEM-F79 is a NUT,UNION.
What parts can replace 6559060 ITEM-F79?
There are 2 known substitutes for 6559060 ITEM-F79: 1385946, 803-1385946 PC-8. Substitute compatibility should be verified for your specific system.
What is the NSN for 6559060 ITEM-F79?
6559060 ITEM-F79 is cataloged in the U.S. Government catalog under NSN 4730-01-329-1129. 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.