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10543-6-6 — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

10543-6-6: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.840 INCHES NOMINAL IN, seat_angle: 45.00 DEGREES NOMINAL, thread_class: 3B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-683-8745, 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
10543-6-6
NSN: 4730-00-683-8745
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 87373 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV HOSE PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleTUBE COUPLING
nut_height0.840 INCHES NOMINAL IN
seat_angle45.00 DEGREES NOMINAL
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
fabrication_methodMACHINED
length_to_shoulder0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
width_across_flats0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
smallest_inside_diameter0.505 INCHES NOMINAL IN
NSN4730-00-683-8745
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 10543-6-6 · 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: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626,1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SEAT ANGLE: 45.00 DEGREES NOMINAL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
NUT HEIGHT: 0.840 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SEAT ANGLE45.00 DEGREES NOMINAL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
NUT HEIGHT0.840 INCHES NOMINAL IN
NUT STYLETUBE COUPLING
THREAD CLASS3B
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10543-6-6?
10543-6-6 is a NUT,TUBE COUPLING.
What is the NSN for 10543-6-6?
10543-6-6 is cataloged in the U.S. Government catalog under NSN 4730-00-683-8745. 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.