PartsTable
Technical Data Sheet
45X4 ✓ 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: COPPER ALLOY 360 OVERALL, leg_length: 0.906 INCHES NOMINAL FIRST END IN, seat_angle: 45.0 DEGREES FIRST END, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL PIPE THIRD END, connection_style: FLARED (TUBE) FIRST END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-257-2098, 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
45X4
NSN: 4730-00-257-2098
FSC: 4730
CAGE: 06852 — ADDRESSEE UNKNOWN
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
leg_length0.906 INCHES NOMINAL FIRST END IN
seat_angle45.0 DEGREES FIRST END
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL PIPE THIRD END
connection_styleFLARED (TUBE) FIRST END
nominal_thread_size0.438 INCHES SECOND END IN
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorUNF SECOND END
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4730-00-257-2098
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 45X4 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
A-345Interchangeable
interchangeable cross-reference
interchangeable
6478958NP6Interchangeable
interchangeable cross-reference
interchangeable
34-61Interchangeable
interchangeable cross-reference
interchangeable
654173-101Interchangeable
interchangeable cross-reference
interchangeable
3461-1Interchangeable
interchangeable cross-reference
interchangeable
5123-12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 45X4?
45X4 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 45X4?
There are 25 known substitutes for 45X4: A-345, 6478958NP6, 34-61 and 22 more. Substitute compatibility should be verified for your specific system.
Is 45X4 still available?
45X4 is currently cancelled.
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