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Technical Data Sheet
PartsTable / COMPONENT / 265205R1
265205R1 ✓ 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 is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.531 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNEF, special_features: COMPRESSION FITTING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-064-8669, 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
265205R1
NSN: 4730-01-064-8669
FSC: 4730
CAGE: 338X5 — ND DEFENSE LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleTUBE COUPLING
nut_height0.531 INCHES NOMINAL IN
thread_class2B
thread_seriesUNEF
special_featuresCOMPRESSION FITTING
thread_directionRIGHT-HAND
length_to_shoulder0.300 INCHES NOMINAL IN
width_across_flats0.750 INCHES NOMINAL IN
nominal_thread_size0.6250 INCHES IN
end_item_identificationMRAP - COMMON NSN - USED ON 2 MRAP VARIANTS AND 4 OTHER WEAPON SYSTEMS.
smallest_inside_diameter0.406 INCHES NOMINAL IN
NSN4730-01-064-8669
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 265205R1 · 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
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
•
NUT STYLE: TUBE COUPLING
•
THREAD CLASS: 2B
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL TUBE OUTSIDE DIAMETER: 0.3750 INCHES IN
•
NOMINAL THREAD SIZE: 0.6250 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONMRAP - COMMON NSN - USED ON 2 MRAP VARIANTS AND 4 OTHER WEAPON SYSTEMS.
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,3/8 FLEX TUBE (LOW PRESSURE FITTING)
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
NUT STYLETUBE COUPLING
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
NOMINAL TUBE OUTSIDE DIAMETER0.3750 INCHES IN
NOMINAL THREAD SIZE0.6250 INCHES IN
THREAD QUANTITY PER INCH24
LENGTH TO SHOULDER0.300 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
61FL-3/8Interchangeable
interchangeable cross-reference
interchangeable
4H2497Interchangeable
interchangeable cross-reference
interchangeable
906248-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 265205R1?
265205R1 is a NUT,TUBE COUPLING.
What parts can replace 265205R1?
There are 3 known substitutes for 265205R1: 61FL-3/8, 4H2497, 906248-6. Substitute compatibility should be verified for your specific system.
Is 265205R1 still available?
265205R1 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