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Technical Data Sheet
PartsTable / COMPONENT / 6FNTX-B
6FNTX-B ✓ 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 CAP,TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_angle: 30.0 DEGREES, thread_class: 3B INTERNAL, connection_style: FLARE, style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-5129, 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
6FNTX-B
NSN: 4730-00-277-5129
FSC: 4730
CAGE: 30780 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV TUBE FITTINGS DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_angle30.0 DEGREES
thread_class3B INTERNAL
connection_styleFLARE
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.562 INCHES INTERNAL IN
thread_series_designatorUNF INTERNAL
tube_outside_diameter_for_which_designed0.375 INCHES NOMINAL IN
NSN4730-00-277-5129
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6FNTX-B · 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
•
THREAD DIRECTION: RIGHT-HAND INTERNAL
•
SEAT ANGLE: 30.0 DEGREES
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THREAD SERIES DESIGNATOR: UNF INTERNAL
•
THREAD CLASS: 3B INTERNAL
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.375 INCHES NOMINAL IN
•
CONNECTION STYLE: FLARE
•
NOMINAL THREAD SIZE: 0.562 INCHES INTERNAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND INTERNAL
SEAT ANGLE30.0 DEGREES
SURFACE TREATMENTCADMIUM OVERALL
THREAD SERIES DESIGNATORUNF INTERNAL
THREAD CLASS3B INTERNAL
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.375 INCHES NOMINAL IN
CONNECTION STYLEFLARE
NOMINAL THREAD SIZE0.562 INCHES INTERNAL IN
MATERIALCOPPER ALLOY OVERALL
STYLE DESIGNATORCAP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
11031Interchangeable
interchangeable cross-reference
interchangeable
5552Interchangeable
interchangeable cross-reference
interchangeable
7007Interchangeable
interchangeable cross-reference
interchangeable
319-6700-771954REVPC13Interchangeable
interchangeable cross-reference
interchangeable
564-4810-937586PC19Interchangeable
interchangeable cross-reference
interchangeable
312-2409-72027PCA4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6FNTX-B?
6FNTX-B is a CAP,TUBE.
What parts can replace 6FNTX-B?
There are 24 known substitutes for 6FNTX-B: 11031, 5552, 7007 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6FNTX-B?
6FNTX-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-5129. 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