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B400-61-4AN — NIPPLE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

B400-61-4AN: NIPPLE,TUBE.

The NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OR COPPER ALLOY OVERALL, leg_length: 0.410 INCHES MINIMUM AND 0.550 INCHES MAXIMUM SECOND END IN, seat_angle: 20.0 DEGREES FIRST END, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE FIRST END BULKHEAD, connection_style: FLARELESS (TUBE) FIRST END BULKHEAD. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-409-3903, 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
B400-61-4AN
NSN: 4730-00-409-3903
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 3T9T9 — SWAGELOK CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OR COPPER ALLOY OVERALL
leg_length0.410 INCHES MINIMUM AND 0.550 INCHES MAXIMUM SECOND END IN
seat_angle20.0 DEGREES FIRST END
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE FIRST END BULKHEAD
connection_styleFLARELESS (TUBE) FIRST END BULKHEAD
style_designatorFLARED AND FLARELESS W/ BULKHEAD THREAD
nominal_thread_size0.438 INCHES SECOND END IN
nominal_overall_length1.828 INCHES IN
end_item_identificationMULTI-APPLICATION
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity1 BULKHEAD NUT AND 2 FERRULE SLEEVE AND 1 SHORT COUPLING NUT
NSN4730-00-409-3903
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B400-61-4AN · 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 BULKHEAD NUT AND 2 FERRULE SLEEVE AND 1 SHORT COUPLING NUT
•
CONNECTION STYLE: FLARED (TUBE) SECOND END
•
NOMINAL OVERALL LENGTH: 1.828 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END BULKHEAD
•
STYLE DESIGNATOR: FLARED AND FLARELESS W/ BULKHEAD THREAD
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 BULKHEAD NUT AND 2 FERRULE SLEEVE AND 1 SHORT COUPLING NUT
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION STYLEFLARELESS (TUBE) FIRST END BULKHEAD
NOMINAL OVERALL LENGTH1.828 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END BULKHEAD
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
STYLE DESIGNATORFLARED AND FLARELESS W/ BULKHEAD THREAD
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES SECOND END IN
LEG LENGTH0.410 INCHES MINIMUM AND 0.550 INCHES MAXIMUM SECOND END 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 4
3307853-1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
400-61-4ANReference document
Same NSN cross-reference
Reference document — Secondary reference
4 XABC 4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4-4XH2BZ-BSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is B400-61-4AN?
B400-61-4AN is a NIPPLE,TUBE.
What parts can replace B400-61-4AN?
There are 4 known substitutes for B400-61-4AN: 3307853-1, 400-61-4AN, 4 XABC 4 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B400-61-4AN?
B400-61-4AN is cataloged in the U.S. Government catalog under NSN 4730-00-409-3903. 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.