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Technical Data Sheet
PartsTable / COMPONENT / BBNX5 P/N591021
BBNX5 P/N591021 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The BBNX5 P/N591021 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-678-1879, 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
BBNX5 P/N591021
NSN: 4730-00-678-1879
FSC: 4730
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
Part NumberBBNX5 P/N591021
NSN4730-00-678-1879
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: BBNX5 P/N591021 · 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
•
SEAT ANGLE IN DEG: 37.0 LOCATION NOT OTHERWISE SPECIFIED
•
THREAD SIZE: 0.375-24 LOCATION NOT OTHERWISE SPECIFIED
•
MATERIAL: COPPER ALLOY 360
•
DEG BETWEEN OUTLETS: 90.0
•
CONNECTION STYLE: INVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
•
FLUID CONNECTION QUANTITY: 3 LOCATION NOT OTHERWISE SPECIFIED
•
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED: 3/16 IN. OD TUBE IN
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE IN DEG37.0 LOCATION NOT OTHERWISE SPECIFIED
OVERALL WIDTH0.820 INCHES NOMINAL IN
THREAD SIZE0.375-24 LOCATION NOT OTHERWISE SPECIFIED
MATERIALCOPPER ALLOY 360
DEG BETWEEN OUTLETS90.0
CONNECTION STYLEINVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED
FLUID CONNECTION QUANTITY3 LOCATION NOT OTHERWISE SPECIFIED
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED3/16 IN. OD TUBE IN
STYLE DESIGNATOR3 FLUID CONNECTIONS W/MOUNTING SLOT
THREAD PROVISIONTHREADED LOCATION NOT OTHERWISE SPECIFIED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
7345127Interchangeable
interchangeable cross-reference
interchangeable
14194Interchangeable
interchangeable cross-reference
interchangeable
14204Interchangeable
interchangeable cross-reference
interchangeable
7345128Interchangeable
interchangeable cross-reference
interchangeable
2920010329872Interchangeable
interchangeable cross-reference
interchangeable
4091050Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BBNX5 P/N591021?
BBNX5 P/N591021 is a BBNX5 P/N591021.
What parts can replace BBNX5 P/N591021?
There are 7 known substitutes for BBNX5 P/N591021: 7345127, 14194, 14204 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BBNX5 P/N591021?
BBNX5 P/N591021 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-678-1879. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026