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B-6M2-1 — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

B-6M2-1: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: TUBE COUPLING, nut_height: 12.7 MILLIMETERS NOMINAL MM, thread_series: ISO M, thread_direction: RIGHT-HAND, fabrication_method: MACHINED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-049-9779, 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
B-6M2-1
NSN: 4730-01-049-9779
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 3T9T9 — SWAGELOK CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleTUBE COUPLING
nut_height12.7 MILLIMETERS NOMINAL MM
thread_seriesISO M
thread_directionRIGHT-HAND
fabrication_methodMACHINED
length_to_shoulder10.7 MILLIMETERS NOMINAL MM
width_across_flats14.0 MILLIMETERS NOMINAL MM
nominal_thread_size6.0 MILLIMETERS MM
thread_pitch_diameters+5.3 TO 5.5 MILLIMETERS MM
thread_tolerance_class6H INTERNAL
smallest_inside_diameter6.0 MILLIMETERS NOMINAL MM
NSN4730-01-049-9779
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B-6M2-1 · 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
•
LENGTH TO SHOULDER: 10.7 MILLIMETERS NOMINAL MM
•
WIDTH ACROSS FLATS: 14.0 MILLIMETERS NOMINAL MM
•
THREAD TOLERANCE CLASS: 6H INTERNAL
•
THREAD SERIES: ISO M
•
THREAD PITCH IN MILLIMETERS: 0.75
•
THREAD PITCH DIAMETERS: +5.3 TO 5.5 MILLIMETERS MM
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 6.0 MILLIMETERS MM
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER10.7 MILLIMETERS NOMINAL MM
WIDTH ACROSS FLATS14.0 MILLIMETERS NOMINAL MM
THREAD TOLERANCE CLASS6H INTERNAL
THREAD SERIESISO M
THREAD PITCH IN MILLIMETERS0.75
THREAD PITCH DIAMETERS+5.3 TO 5.5 MILLIMETERS MM
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE6.0 MILLIMETERS MM
NUT HEIGHT12.7 MILLIMETERS NOMINAL MM
NUT STYLETUBE COUPLING
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 B-6M2-1?
B-6M2-1 is a NUT,TUBE COUPLING.
What is the NSN for B-6M2-1?
B-6M2-1 is cataloged in the U.S. Government catalog under NSN 4730-01-049-9779. 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.