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AJ4BU — NIPPLE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AJ4BU: NIPPLE,TUBE.

The NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: FLARED (TUBE) ALL ENDS, style_designator: FLARED W/ BULKHEAD THREAD. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-568-4477, 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
AJ4BU
NSN: 4730-01-568-4477
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79926 — SSP FITTINGS CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
seat_angle37.0 DEGREES ALL ENDS
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARED (TUBE) ALL ENDS
style_designatorFLARED W/ BULKHEAD THREAD
operating_pressure6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES ALL ENDS IN
nominal_overall_length2.070 INCHES IN
end_item_identificationCAPTURE SPINE
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorUNF ALL ENDS
NSN4730-01-568-4477
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AJ4BU · 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
•
FURNISHED ITEMS AND QUANTITY: 1 NUT ASSEMBLY
•
CONNECTION STYLE: FLARED (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 2.070 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: FLARED W/ BULKHEAD THREAD
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
REDUCED PASSAGE NOMINAL INSIDE DIAMETER: 0.170 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 NUT ASSEMBLY
CONNECTION STYLEFLARED (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH2.070 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
STYLE DESIGNATORFLARED W/ BULKHEAD THREAD
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
OPERATING PRESSURE6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
REDUCED PASSAGE NOMINAL INSIDE DIAMETER0.170 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
SEAT ANGLE37.0 DEGREES ALL ENDS
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AJ4BU?
AJ4BU is a NIPPLE,TUBE.
What is the NSN for AJ4BU?
AJ4BU is cataloged in the U.S. Government catalog under NSN 4730-01-568-4477. 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.