PartsTable
Technical Data Sheet
646FU34B ✓ 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 ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 377 OR COPPER ALLOY 360 OVERALL, seat_angle: 45.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARED (TUBE) FIRST END, operating_pressure: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-289-0379, 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
646FU34B
NSN: 4730-00-289-0379
FSC: 4730
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY 377 OR COPPER ALLOY 360 OVERALL
seat_angle45.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARED (TUBE) FIRST END
operating_pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES FIRST END IN
nominal_overall_length1.250 INCHES IN
media_for_which_designedREFRIGERATION COMPOUND SINGLE RESPONSE
thread_series_designatorUNF FIRST END
nondefinitive_spec/std_data4 FIGURE
specification/standard_data81343-J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-289-0379
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 646FU34B · 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: 45.0 DEGREES FIRST END
NOMINAL OVERALL LENGTH: 1.250 INCHES IN
MEDIA FOR WHICH DESIGNED: REFRIGERATION COMPOUND SINGLE RESPONSE
NONDEFINITIVE SPEC/STD DATA: 4 FIGURE
MATERIAL: COPPER ALLOY 377 OR COPPER ALLOY 360 OVERALL
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN
THREAD SERIES DESIGNATOR: UNF FIRST END
SPECIFICATION/STANDARD DATA: 81343-J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE45.0 DEGREES FIRST END
NOMINAL OVERALL LENGTH1.250 INCHES IN
MEDIA FOR WHICH DESIGNEDREFRIGERATION COMPOUND SINGLE RESPONSE
NONDEFINITIVE SPEC/STD DATA4 FIGURE
MATERIALCOPPER ALLOY 377 OR COPPER ALLOY 360 OVERALL
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
THREAD SERIES DESIGNATORUNF FIRST END
SPECIFICATION/STANDARD DATA81343-J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
CONNECTION TYPETHREADED INTERNAL PIPE SECOND END
THREAD CLASS2A FIRST END A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
0204-8-8BInterchangeable
interchangeable cross-reference
interchangeable
46X8X8Interchangeable
interchangeable cross-reference
interchangeable
J512Interchangeable
interchangeable cross-reference
interchangeable
U1-4CInterchangeable
interchangeable cross-reference
interchangeable
648-F-04X06Interchangeable
interchangeable cross-reference
interchangeable
A1197Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 646FU34B?
646FU34B is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 646FU34B?
There are 29 known substitutes for 646FU34B: 0204-8-8B, 46X8X8, J512 and 26 more. Substitute compatibility should be verified for your specific system.
Is 646FU34B still available?
646FU34B is currently cancelled.
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