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6FMK4 — NIPPLE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6FMK4: NIPPLE,TUBE.

The NIPPLE,TUBE is a the manufacturer industrial component. Key specifications include seat_angle: 60.0 DEGREES ALL ENDS, special_features: 0.35 INCH FIRST END SIZE, 0.25 INCH SECOND END SIZE IN, style_designator: CENTER WRENCHING FACILITY, nominal_overall_length: 35.1 MILLIMETERS MM, part_name_assigned_by_controlling_agency: NPTF MALE CONNECTOR. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-687-9452, 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
6FMK4
NSN: 4730-01-687-9452
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 30780 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV TUBE FITTINGS DIVISION (USA)
SPECIFICATIONS
seat_angle60.0 DEGREES ALL ENDS
special_features0.35 INCH FIRST END SIZE, 0.25 INCH SECOND END SIZE IN
style_designatorCENTER WRENCHING FACILITY
nominal_overall_length35.1 MILLIMETERS MM
part_name_assigned_by_controlling_agencyNPTF MALE CONNECTOR
NSN4730-01-687-9452
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6FMK4 · 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
•
NOMINAL OVERALL LENGTH: 35.1 MILLIMETERS MM
•
STYLE DESIGNATOR: CENTER WRENCHING FACILITY
•
SEAT ANGLE: 60.0 DEGREES ALL ENDS
TECHNICAL CHARACTERISTICS
NOMINAL OVERALL LENGTH35.1 MILLIMETERS MM
STYLE DESIGNATORCENTER WRENCHING FACILITY
SEAT ANGLE60.0 DEGREES ALL ENDS
SPECIAL FEATURES0.35 INCH FIRST END SIZE, 0.25 INCH SECOND END SIZE IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNPTF MALE CONNECTOR
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6FMK4?
6FMK4 is a NIPPLE,TUBE.
What is the NSN for 6FMK4?
6FMK4 is cataloged in the U.S. Government catalog under NSN 4730-01-687-9452. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.