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BACN10DU4 — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

BACN10DU4: LOCKNUT,TUBE FITTING.

The LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 633 OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.281 INCHES NOMINAL IN, special_features: END ITEM - STABILIZER TRIM ASSY B-52; DWING NAME IS NUT, RECESSED UNIVERSAL; DRILLED FOR 2 LOCKWIRE HOLES., thread_direction: RIGHT-HAND, width_across_flats: 0.688 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-520-3268, 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
BACN10DU4
NSN: 4730-01-520-3268
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 633 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.281 INCHES NOMINAL IN
special_featuresEND ITEM - STABILIZER TRIM ASSY B-52; DWING NAME IS NUT, RECESSED UNIVERSAL; DRILLED FOR 2 LOCKWIRE HOLES.
thread_directionRIGHT-HAND
width_across_flats0.688 INCHES NOMINAL IN
packing_recess_depth0.042 INCHES NOMINAL IN
packing_recess_diameter0.080 INCHES NOMINAL IN
nominal_tube_outside_diameter0.250 INCHES IN
NSN4730-01-520-3268
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: BACN10DU4 · 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: 0.688 INCHES NOMINAL IN
•
PACKING RECESS DIAMETER: 0.080 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.281 INCHES NOMINAL IN
•
NUT STYLE: TUBE FITTING LOCKNUT
•
MATERIAL: STEEL COMP 633 OVERALL
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.688 INCHES NOMINAL IN
PACKING RECESS DIAMETER0.080 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.281 INCHES NOMINAL IN
SPECIAL FEATURESEND ITEM - STABILIZER TRIM ASSY B-52; DWING NAME IS NUT, RECESSED UNIVERSAL; DRILLED FOR 2 LOCKWIRE HOLES.
NUT STYLETUBE FITTING LOCKNUT
MATERIALSTEEL COMP 633 OVERALL
NOMINAL TUBE OUTSIDE DIAMETER0.250 INCHES IN
PACKING RECESS DEPTH0.042 INCHES NOMINAL IN
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 BACN10DU4?
BACN10DU4 is a LOCKNUT,TUBE FITTING.
What is the NSN for BACN10DU4?
BACN10DU4 is cataloged in the U.S. Government catalog under NSN 4730-01-520-3268. 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.