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DPL4021 — REDUCER,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

DPL4021: REDUCER,TUBE.

The REDUCER,TUBE is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY UNS R54520 OVERALL, seat_angle: 12.0 DEGREES FIRST END, reducer_type: CONCENTRIC, thread_class: 3B FIRST END, connection_type: UNTHREADED INTERNAL TUBE SECOND END, connection_style: SWIVEL NUT, FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL) (TUBE) FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-438-3198, 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
DPL4021
NSN: 4730-01-438-3198
NIINs: 014383198, 014383200, 014448842, 014535447, 014537475, 014537817, 014537825, 014539391, 014539438
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 14798 — DESIGNED METAL CONNECTIONS INC DBA PERMASWAGE USA DIV PERMASWAGE, A PCC COMPANY (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R54520 OVERALL
seat_angle12.0 DEGREES FIRST END
reducer_typeCONCENTRIC
thread_class3B FIRST END
connection_typeUNTHREADED INTERNAL TUBE SECOND END
connection_styleSWIVEL NUT, FLARELESS (SWIVEL NUT ATTACHMENT METHOD OPTIONAL) (TUBE) FIRST END
operating_pressure4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.750 INCHES FIRST END IN
maximum_operating_temp-450.0 FAHRENHEIT SECOND RESPONSE DEGF
nominal_overall_length1.755 INCHES IN
end_item_identificationAIRCRAFT, AIRLIFTER, C-17A A
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
NSN4730-01-438-3198
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: DPL4021 · 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
SUBSTITUTES & CROSS-REFERENCES 2
7D0473Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
7D0473T06-04Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is DPL4021?
DPL4021 is a REDUCER,TUBE.
What parts can replace DPL4021?
There are 2 known substitutes for DPL4021: 7D0473, 7D0473T06-04. Substitute compatibility should be verified for your specific system.
What is the NSN for DPL4021?
DPL4021 is cataloged in the U.S. Government catalog under NSN 4730-01-438-3198. This indicates validated use in U.S. government and defense supply chains.
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