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B-400-C — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

B-400-C: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_angle: 20.0 DEGREES, thread_class: 2A EXTERNAL A, connection_style: PRESSURE SEAL FLARELESS, style_designator: CAP, TUBE, FLARELESS, thread_direction: RIGHT-HAND EXTERNAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-032-1691, 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
B-400-C
NSN: 4730-01-032-1691
NIINs: 010321691, 010740366
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 3T9T9 — SWAGELOK CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_angle20.0 DEGREES
thread_class2A EXTERNAL A
connection_stylePRESSURE SEAL FLARELESS
style_designatorCAP, TUBE, FLARELESS
thread_directionRIGHT-HAND EXTERNAL
features_providedNUT
nominal_thread_size0.438 INCHES EXTERNAL IN
thread_series_designatorUNF EXTERNAL
criticality_code_justificationZZZY
tube_outside_diameter_for_which_designed0.250 INCHES NOMINAL IN
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
NSN4730-01-032-1691
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B-400-C · 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
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedDemilitarization required (F)
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FREQUENTLY ASKED QUESTIONS
What is B-400-C?
B-400-C is a CAP,TUBE.
What is the NSN for B-400-C?
B-400-C is cataloged in the U.S. Government catalog under NSN 4730-01-032-1691. 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.