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PartsTable / COMPONENT / HE273-0033-0001
HE273-0033-0001 ✓ 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 REDUCER,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, seat_angle: 12.0 DEGREES FIRST END, reducer_type: CONCENTRIC, thread_class: 3A ALL ENDS A, connection_style: FLARELESS (TUBE) FIRST END, surface_treatment: ANODIZE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-115-3864, 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
HE273-0033-0001
NSN: 4730-00-115-3864
FSC: 4730
CAGE: 89372 — ROCKWELL INTERNATIONAL CORP NORTH AMERICAN AIRCRAFT OPNS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
seat_angle12.0 DEGREES FIRST END
reducer_typeCONCENTRIC
thread_class3A ALL ENDS A
connection_styleFLARELESS (TUBE) FIRST END
surface_treatmentANODIZE OVERALL
nominal_thread_size0.438 INCHES SECOND END IN
nominal_overall_length1.890 INCHES IN
thread_series_designatorUNF ALL ENDS
material_document_and_classificationQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.375 INCHES FIRST END IN
NSN4730-00-115-3864
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: HE273-0033-0001 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES SECOND END IN
•
REDUCER TYPE: CONCENTRIC
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
MATERIAL: ALUMINUM ALLOY 2024 OVERALL
•
CONNECTION STYLE: FLARED (TUBE) SECOND END
•
THREAD CLASS: 3A ALL ENDS A
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES SECOND END IN
REDUCER TYPECONCENTRIC
THREAD SERIES DESIGNATORUNF ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES FIRST END IN
MATERIALALUMINUM ALLOY 2024 OVERALL
CONNECTION STYLEFLARED (TUBE) SECOND END
THREAD CLASS3A ALL ENDS A
SEAT ANGLE37.0 DEGREES SECOND END
CONNECTION STYLEFLARELESS (TUBE) FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
X18220Interchangeable
interchangeable cross-reference
interchangeable
218443Interchangeable
interchangeable cross-reference
interchangeable
1A21-443Interchangeable
interchangeable cross-reference
interchangeable
805027Interchangeable
interchangeable cross-reference
interchangeable
21-443Interchangeable
interchangeable cross-reference
interchangeable
54A50E45Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HE273-0033-0001?
HE273-0033-0001 is a REDUCER,TUBE.
What parts can replace HE273-0033-0001?
There are 16 known substitutes for HE273-0033-0001: X18220, 218443, 1A21-443 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HE273-0033-0001?
HE273-0033-0001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-115-3864. 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