PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 44X4
44X4 ✓ 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 DEFLECTOR,LINK-CARTRIDGE CASE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OR COPPER ALLOY 377 OVERALL, leg_length: 0.875 INCHES NOMINAL ALL ENDS IN, seat_angle: 45.0 DEGREES ALL ENDS, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: FLARED (TUBE) ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-249-2022, 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
44X4
NSN: 4730-00-249-2022
FSC: 4730
CAGE: 79479 — MICHELMANN STEEL CONSTRUCTION COMPANY DBA MID-STATES DOOR AND HARDWARE (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OR COPPER ALLOY 377 OVERALL
leg_length0.875 INCHES NOMINAL ALL ENDS IN
seat_angle45.0 DEGREES ALL ENDS
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARED (TUBE) ALL ENDS
operating_pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES ALL ENDS IN
media_for_which_designedREFRIGERATION COMPOUND SINGLE RESPONSE
thread_series_designatorUNF ALL ENDS
nondefinitive_spec/std_data16 FIGURE AND 1 TABLE
specification/standard_data81343-SAE J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-249-2022
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 44X4 · 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
•
THREAD CLASS: 2A ALL ENDS A
•
SEAT ANGLE: 45.0 DEGREES ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: 72 ASSN STD ALL MATERIAL RESPONSES OR 88 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 16 FIGURE AND 1 TABLE
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 81343-SAE J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
OPERATING PRESSURE: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MEDIA FOR WHICH DESIGNED: REFRIGERATION COMPOUND SINGLE RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A ALL ENDS A
SEAT ANGLE45.0 DEGREES ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATION72 ASSN STD ALL MATERIAL RESPONSES OR 88 ASSN STD ALL MATERIAL RESPONSES OVERALL
NONDEFINITIVE SPEC/STD DATA16 FIGURE AND 1 TABLE
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA81343-SAE J513 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
OPERATING PRESSURE500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MEDIA FOR WHICH DESIGNEDREFRIGERATION COMPOUND SINGLE RESPONSE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNF ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
A57432Interchangeable
interchangeable cross-reference
interchangeable
334-1Interchangeable
interchangeable cross-reference
interchangeable
5039-515Interchangeable
interchangeable cross-reference
interchangeable
10816Interchangeable
interchangeable cross-reference
interchangeable
LC395BULInterchangeable
interchangeable cross-reference
interchangeable
222-23PC222-23RInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 44X4?
44X4 is a DEFLECTOR,LINK-CARTRIDGE CASE.
What parts can replace 44X4?
There are 25 known substitutes for 44X4: A57432, 334-1, 5039-515 and 22 more. Substitute compatibility should be verified for your specific system.
Is 44X4 still available?
44X4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026