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Technical Data Sheet
PartsTable / COMPONENT / 639-F-6
639-F-6 ✓ 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 PLUG,TUBE FITTING,THREADED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, seat_angle: 45.0 DEGREES, head_height: 0.250 INCHES NOMINAL IN, thread_class: 2A EXTERNAL A, overall_length: 0.875 INCHES NOMINAL IN, connection_style: PLAIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-820-6204, 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
639-F-6
NSN: 4730-00-820-6204
FSC: 4730
CAGE: 93061 — PARKER-HANNIFIN CORP DIV FLUID SYSTEM CONNECTOR DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
seat_angle45.0 DEGREES
head_height0.250 INCHES NOMINAL IN
thread_class2A EXTERNAL A
overall_length0.875 INCHES NOMINAL IN
connection_stylePLAIN
style_designatorPLUG, TUBE FITTING FLARED (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
thread_directionRIGHT-HAND EXTERNAL
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
nominal_thread_size0.625 INCHES EXTERNAL IN
media_for_which_designedGAS, NATURAL
thread_series_designatorUNF EXTERNAL
NSN4730-00-820-6204
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 639-F-6 · 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
•
MEDIA FOR WHICH DESIGNED: GAS, NATURAL
•
SEAT ANGLE: 45.0 DEGREES
•
MATERIAL: COPPER ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UNF EXTERNAL
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
STYLE DESIGNATOR: PLUG, TUBE FITTING FLARED (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
•
CONNECTION STYLE: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH0.875 INCHES NOMINAL IN
MEDIA FOR WHICH DESIGNEDGAS, NATURAL
SEAT ANGLE45.0 DEGREES
MATERIALCOPPER ALLOY OVERALL
THREAD SERIES DESIGNATORUNF EXTERNAL
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
STYLE DESIGNATORPLUG, TUBE FITTING FLARED (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
CONNECTION STYLEPLAIN
THREAD DIRECTIONRIGHT-HAND EXTERNAL
THREAD CLASS2A EXTERNAL A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
3383Interchangeable
interchangeable cross-reference
interchangeable
211618Interchangeable
interchangeable cross-reference
interchangeable
2030-789Interchangeable
interchangeable cross-reference
interchangeable
16FM18C7-32Interchangeable
interchangeable cross-reference
interchangeable
7-32BALLGRADE2Interchangeable
interchangeable cross-reference
interchangeable
G12-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 639-F-6?
639-F-6 is a PLUG,TUBE FITTING,THREADED.
What parts can replace 639-F-6?
There are 20 known substitutes for 639-F-6: 3383, 211618, 2030-789 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 639-F-6?
639-F-6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-820-6204. 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