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Technical Data Sheet
PartsTable / COMPONENT / 640F-8
640F-8 ✓ 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 NUT,TUBE COUPLING,REDUCING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_angle: 45.0 DEGREES, thread_class: 2B INTERNAL, connection_style: FLARE, style_designator: CAP, thread_direction: RIGHT-HAND INTERNAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-260-8288, 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
640F-8
NSN: 4730-00-260-8288
FSC: 4730
CAGE: 93061 — PARKER-HANNIFIN CORP DIV FLUID SYSTEM CONNECTOR DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_angle45.0 DEGREES
thread_class2B INTERNAL
connection_styleFLARE
style_designatorCAP
thread_directionRIGHT-HAND INTERNAL
nominal_thread_size0.750 INCHES INTERNAL IN
thread_quantity_per_inch16 INTERNAL
thread_series_designatorUNF INTERNAL
nondefinitive_spec/std_data37 FIGURE
tube_outside_diameter_for_which_designed0.500 INCHES NOMINAL IN
NSN4730-00-260-8288
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 640F-8 · 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
•
CONNECTION STYLE: FLARE
•
MATERIAL: COPPER ALLOY OVERALL
•
SEAT ANGLE: 45.0 DEGREES
•
NOMINAL THREAD SIZE: 0.750 INCHES INTERNAL IN
•
THREAD SERIES DESIGNATOR: UNF INTERNAL
•
NONDEFINITIVE SPEC/STD DATA: 37 FIGURE
•
STYLE DESIGNATOR: CAP
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND INTERNAL
CONNECTION STYLEFLARE
MATERIALCOPPER ALLOY OVERALL
SEAT ANGLE45.0 DEGREES
NOMINAL THREAD SIZE0.750 INCHES INTERNAL IN
THREAD SERIES DESIGNATORUNF INTERNAL
NONDEFINITIVE SPEC/STD DATA37 FIGURE
STYLE DESIGNATORCAP
THREAD CLASS2B INTERNAL
THREAD QUANTITY PER INCH16 INTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
N5-10Interchangeable
interchangeable cross-reference
interchangeable
W4642Interchangeable
interchangeable cross-reference
interchangeable
30 2 1/2IN50T10Interchangeable
interchangeable cross-reference
interchangeable
30 2 1/2IN50T100PSI N-510Interchangeable
interchangeable cross-reference
interchangeable
N-5/10Interchangeable
interchangeable cross-reference
interchangeable
B229701-44 AND B229722-42Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 640F-8?
640F-8 is a NUT,TUBE COUPLING,REDUCING.
What parts can replace 640F-8?
There are 13 known substitutes for 640F-8: N5-10, W4642, 30 2 1/2IN50T10 and 10 more. Substitute compatibility should be verified for your specific system.
Is 640F-8 still available?
640F-8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026