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12-FNTX-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 seat_angle: 37.0 DEGREES, thread_class: 2B INTERNAL, connection_style: FLARE, style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL, nominal_thread_size: 0.750 INCHES INTERNAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-5708, 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
12-FNTX-B
NSN: 4730-00-278-5708
FSC: 4730
CAGE: 98441 — PARKER HANNIFIN CORP DBA PNEUTRONICS DIV STRATOFLEX PRODUCTS DIVISION (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES
thread_class2B INTERNAL
connection_styleFLARE
special_featuresMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
nominal_thread_size0.750 INCHES INTERNAL IN
thread_series_designatorUNF INTERNAL
criticality_code_justificationFEAT
tube_outside_diameter_for_which_designed0.750 INCHES NOMINAL IN
NSN4730-00-278-5708
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 12-FNTX-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 SERIES DESIGNATOR: UN INTERNAL
•
THREAD QUANTITY PER INCH: 12 INTERNAL
•
NOMINAL THREAD SIZE: 1.062 INCHES INTERNAL IN
•
THREAD DIRECTION: RIGHT-HAND INTERNAL
•
THREAD CLASS: 2B INTERNAL
•
MATERIAL: COPPER ALLOY OVERALL
•
CONNECTION STYLE: FLARE
•
SEAT ANGLE: 37.0 DEGREES
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUN INTERNAL
THREAD QUANTITY PER INCH12 INTERNAL
NOMINAL THREAD SIZE1.062 INCHES INTERNAL IN
THREAD DIRECTIONRIGHT-HAND INTERNAL
THREAD CLASS2B INTERNAL
MATERIALCOPPER ALLOY OVERALL
CONNECTION STYLEFLARE
SEAT ANGLE37.0 DEGREES
STYLE DESIGNATORCAP
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
12-FNTX-BInterchangeable
interchangeable cross-reference
interchangeable
MS51532-B12SInterchangeable
interchangeable cross-reference
interchangeable
12 FNTXInterchangeable
interchangeable cross-reference
interchangeable
3052430Interchangeable
interchangeable cross-reference
interchangeable
12 FNTX-SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12-FNTX-B?
12-FNTX-B is a CAP,TUBE.
What parts can replace 12-FNTX-B?
There are 5 known substitutes for 12-FNTX-B: 12-FNTX-B, MS51532-B12S, 12 FNTX and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12-FNTX-B?
12-FNTX-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-5708. 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