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Technical Data Sheet
PartsTable / COMPONENT / 665-312
665-312 ✓ 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 ADAPTER,STRAIGHT,TUBE TO HOSE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, head_height: 0.188 INCHES NOMINAL IN, thread_class: 2A EXTERNAL A, head_diameter: 1.000 INCHES NOMINAL IN, thread_length: 0.312 INCHES NOMINAL EXTERNAL IN, overall_length: 0.562 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-130-4269, 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
665-312
NSN: 4730-00-130-4269
FSC: 4730
CAGE: 00624 — EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
head_height0.188 INCHES NOMINAL IN
thread_class2A EXTERNAL A
head_diameter1.000 INCHES NOMINAL IN
thread_length0.312 INCHES NOMINAL EXTERNAL IN
overall_length0.562 INCHES NOMINAL IN
connection_stylePLAIN
flange_thickness0.094 INCHES NOMINAL IN
thread_directionRIGHT-HAND EXTERNAL
surface_treatmentENAMEL OVERALL
nominal_thread_size0.688 INCHES EXTERNAL IN
thread_series_designatorUNEF EXTERNAL
NSN4730-00-130-4269
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 665-312 · 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 CLASS: 3B FIRST END
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT (UNJ) FIRST END
•
FLOW ANGLE: 90.0 DEGREES
•
MATERIAL DOCUMENT AND CLASSIFICATION: WW-T-700,T6,TY 2 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 1.062 INCHES FIRST END IN
•
THREAD QUANTITY PER INCH: 12 FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B FIRST END
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ) FIRST END
FLOW ANGLE90.0 DEGREES
MATERIAL DOCUMENT AND CLASSIFICATIONWW-T-700,T6,TY 2 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE1.062 INCHES FIRST END IN
THREAD QUANTITY PER INCH12 FIRST END
FURNISHED ITEMS AND QUANTITY1 HOSE COUPLING SLEEVE AND 1 HOSE COUPLING NUT
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.625 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
CA143B16583Interchangeable
interchangeable cross-reference
interchangeable
665-312Interchangeable
interchangeable cross-reference
interchangeable
F6653-12Interchangeable
Same NIIN cross-reference
interchangeable
MIL-DTL-27272Interchangeable
Same NIIN cross-reference
interchangeable
MILF27272Interchangeable
Same NIIN cross-reference
interchangeable
MS27057-12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 665-312?
665-312 is a ADAPTER,STRAIGHT,TUBE TO HOSE.
What parts can replace 665-312?
There are 6 known substitutes for 665-312: CA143B16583, 665-312, F6653-12 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 665-312?
665-312 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-130-4269. 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