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BACN10DU — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

BACN10DU: 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: 0.281 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, special_features: DRILLED FOR 2 LOCKWIRE HOLES,0.046 IN. DIA IN.

This part is cataloged in the U.S. Government catalog under NSN 4730-00-659-8976, 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
BACN10DU
NSN: 4730-00-659-8976
NIINs: 006598976, 011929551
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.281 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
special_featuresDRILLED FOR 2 LOCKWIRE HOLES,0.046 IN. DIA IN
thread_directionRIGHT-HAND
width_across_flats0.688 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
packing_recess_depth0.042 INCHES NOMINAL IN
packing_recess_diameter0.608 INCHES NOMINAL IN
thread_quantity_per_inch20
NSN4730-00-659-8976
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: BACN10DU · 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: 0.996 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN
•
PACKING RECESS DIAMETER: 0.915 INCHES MINIMUM AND 0.925 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
NUT HEIGHT: 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
•
NUT STYLE: TUBE FITTING LOCKNUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.996 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN
PACKING RECESS DIAMETER0.915 INCHES MINIMUM AND 0.925 INCHES MAXIMUM IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
NUT HEIGHT0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
NUT STYLETUBE FITTING LOCKNUT
THREAD CLASS3B
THREAD QUANTITY PER INCH16
SUBSTITUTES & CROSS-REFERENCES 3
BACN10DU8CReference document
Same NSN cross-reference
Reference document — Secondary reference
BACN10DU8JSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AS4841Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 BACN10DU?
BACN10DU is a LOCKNUT,TUBE FITTING.
What parts can replace BACN10DU?
There are 3 known substitutes for BACN10DU: BACN10DU8C, BACN10DU8J, AS4841. Substitute compatibility should be verified for your specific system.
What is the NSN for BACN10DU?
BACN10DU is cataloged in the U.S. Government catalog under NSN 4730-00-659-8976. 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.