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11176409-7 — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

11176409-7: LOCKNUT,TUBE FITTING.

The LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.809 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-383-5404, 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
11176409-7
NSN: 4730-01-383-5404
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 38597 — LOCKHEED MARTIN CORPORATION DIV ROTARY AND MISSION SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.809 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.809 INCHES MINIMUM AND 0.816 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
packing_recess_diameter0.728 INCHES MINIMUM AND 0.738 INCHES MAXIMUM IN
thread_quantity_per_inch18
nominal_tube_outside_diameter0.375 INCHES IN
NSN4730-01-383-5404
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 11176409-7 · 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: 0.809 INCHES MINIMUM AND 0.816 INCHES MAXIMUM IN
•
PACKING RECESS DIAMETER: 0.728 INCHES MINIMUM AND 0.738 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.562 INCHES IN
•
NUT HEIGHT: 0.809 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NUT STYLE: TUBE FITTING LOCKNUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.809 INCHES MINIMUM AND 0.816 INCHES MAXIMUM IN
PACKING RECESS DIAMETER0.728 INCHES MINIMUM AND 0.738 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.562 INCHES IN
NUT HEIGHT0.809 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLETUBE FITTING LOCKNUT
THREAD CLASS3B
THREAD QUANTITY PER INCH18
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
11176409Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 11176409-7?
11176409-7 is a LOCKNUT,TUBE FITTING.
What parts can replace 11176409-7?
There is 1 known substitute for 11176409-7: 11176409. Substitute compatibility should be verified for your specific system.
What is the NSN for 11176409-7?
11176409-7 is cataloged in the U.S. Government catalog under NSN 4730-01-383-5404. 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.