PartsTable
Technical Data Sheet
D21665 ✓ 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,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_angle: 30.0 DEGREES FIRST END, thread_class: 2B FIRST END, connection_type: THREADED INTERNAL TUBE FIRST END, connection_style: INVERTED FLARE (TUBE) FIRST END, nominal_thread_size: 0.500 INCHES SECOND END 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 4730-00-430-9234, 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
D21665
NSN: 4730-00-430-9234
FSC: 4730
CAGE: 23926 — KOMATSU AMERICA CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_angle30.0 DEGREES FIRST END
thread_class2B FIRST END
connection_typeTHREADED INTERNAL TUBE FIRST END
connection_styleINVERTED FLARE (TUBE) FIRST END
nominal_thread_size0.500 INCHES SECOND END IN
nominal_overall_length1.656 INCHES IN
thread_quantity_per_inch18 FIRST END
thread_series_designatorUNS FIRST END
nominal_pipe_size_accommodated0.500 INCHES SECOND END IN
nominal_outside_diameter_tube_accommodated0.625 INCHES FIRST END IN
NSN4730-00-430-9234
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: D21665 · 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 THREAD SIZE: 0.938 INCHES FIRST END IN
SEAT ANGLE: 30.0 DEGREES FIRST END
CONNECTION STYLE: INVERTED FLARE (TUBE) FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.625 INCHES FIRST END IN
CONNECTION TYPE: THREADED INTERNAL TUBE FIRST END
THREAD CLASS: 2B FIRST END
NOMINAL PIPE SIZE ACCOMMODATED: 0.500 INCHES SECOND END IN
THREAD SERIES DESIGNATOR: NPTF SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.938 INCHES FIRST END IN
SEAT ANGLE30.0 DEGREES FIRST END
CONNECTION STYLEINVERTED FLARE (TUBE) FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.625 INCHES FIRST END IN
CONNECTION TYPETHREADED INTERNAL TUBE FIRST END
THREAD CLASS2B FIRST END
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES SECOND END IN
THREAD SERIES DESIGNATORNPTF SECOND END
MATERIALSTEEL OVERALL
CONNECTION TYPETHREADED INTERNAL PIPE SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
27-379Interchangeable
interchangeable cross-reference
interchangeable
B107.100Interchangeable
interchangeable cross-reference
interchangeable
B107.9 TY3CL1Interchangeable
interchangeable cross-reference
interchangeable
05-51638Interchangeable
interchangeable cross-reference
interchangeable
74372AInterchangeable
interchangeable cross-reference
interchangeable
74372Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D21665?
D21665 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace D21665?
There are 10 known substitutes for D21665: 27-379, B107.100, B107.9 TY3CL1 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D21665?
D21665 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-430-9234. This indicates validated use in U.S. government and defense supply chains.
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