PartsTable
Technical Data Sheet
HS4520-4D ✓ 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 COUPLING,TUBE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, seat_angle: 12.0 DEGREES SECOND END, thread_class: 3A SECOND END BULKHEAD A, connection_type: THREADED EXTERNAL TUBE SECOND END, connection_style: FLARELESS (TUBE) SECOND END, style_designator: SWAGED AND THREADED EXTERNAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-013-2531, 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
HS4520-4D
NSN: 4730-01-013-2531
FSC: 4730
CAGE: 8V613 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
seat_angle12.0 DEGREES SECOND END
thread_class3A SECOND END BULKHEAD A
connection_typeTHREADED EXTERNAL TUBE SECOND END
connection_styleFLARELESS (TUBE) SECOND END
special_featuresTHE EXTERNAL SURFACE OF THE PERMASWAGE END,WILL BE PLASTIC,TETRAFLUOROETHYLENE COATED,PER DEUTSCH CO. SPEC NO. DMCPS1009,TO 0.190 IN. MIN,0.220 IN. MAX,INTO THE FITTING BORE IN
style_designatorSWAGED AND THREADED EXTERNAL
surface_treatmentPLASTIC POLYTETRAFLUOROETHYLENE AND ANODIZE OUTSIDE
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES SECOND END BULKHEAD IN
maximum_operating_temp135.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.046 INCHES IN
NSN4730-01-013-2531
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: HS4520-4D · 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
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD CLASS: 3A SECOND END A
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
CONNECTION STYLE: FLARELESS (TUBE) SECOND END
CONNECTION TYPE: THREADED EXTERNAL TUBE SECOND END
MAXIMUM OPERATING TEMP: 135.0 FAHRENHEIT SINGLE RESPONSE DEGF
NOMINAL THREAD SIZE: 0.438 INCHES SECOND END BULKHEAD IN
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD CLASS3A SECOND END A
MATERIALALUMINUM ALLOY 6061 OVERALL
CONNECTION STYLEFLARELESS (TUBE) SECOND END
CONNECTION TYPETHREADED EXTERNAL TUBE SECOND END
MAXIMUM OPERATING TEMP135.0 FAHRENHEIT SINGLE RESPONSE DEGF
NOMINAL THREAD SIZE0.438 INCHES SECOND END BULKHEAD IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) SECOND END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS3A SECOND END BULKHEAD A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
H10019D10Interchangeable
interchangeable cross-reference
interchangeable
D10019D10Interchangeable
interchangeable cross-reference
interchangeable
BACU24BJInterchangeable
interchangeable cross-reference
interchangeable
D10019D16Interchangeable
interchangeable cross-reference
interchangeable
BACU24BJ16DInterchangeable
interchangeable cross-reference
interchangeable
SAE-AS83519/2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HS4520-4D?
HS4520-4D is a COUPLING,TUBE.
What parts can replace HS4520-4D?
There are 10 known substitutes for HS4520-4D: H10019D10, D10019D10, BACU24BJ and 7 more. Substitute compatibility should be verified for your specific system.
Is HS4520-4D still available?
HS4520-4D is currently cancelled.
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