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Technical Data Sheet
53668 ✓ 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 CORE CONDUCTOR SINGLE CONDUCTOR, thread_size: 3/8-24, thread_class: 2A A, conductor_form: BRAID, TUBULAR LOCATION NOT OTHERWISE SPECIFIED, overall_length: 0.563 INCHES NOMINAL IN, style_designator: INVERTED NUT, TUBE, FLARE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-014-2431, 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
53668
NSN: 4730-00-014-2431
FSC: 4730
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialCOPPER CORE CONDUCTOR SINGLE CONDUCTOR
thread_size3/8-24
thread_class2A A
conductor_formBRAID, TUBULAR LOCATION NOT OTHERWISE SPECIFIED
overall_length0.563 INCHES NOMINAL IN
style_designatorINVERTED NUT, TUBE, FLARE
termination_typeSTRIPPED SECOND END SINGLE CONDUCTOR
thread_directionRIGHT-HAND
seat_angle_in_deg45.0
width_across_flats0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
lead_overall_length1.500 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-014-2431
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 53668 · 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 A
SCREW THREAD SERIES DESIGNATOR: UNF
MATERIAL: COPPER ALLOY 360
SPECIFICATION/STANDARD DATA: 81343-J512 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
STYLE DESIGNATOR: INVERTED NUT, TUBE, FLARE
MATERIAL DOCUMENT AND CLASSIFICATION: SAE CA360, 1/2H ASSN STD SINGLE MATERIAL RESPONSE
WIDTH ACROSS FLATS: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
SCREW THREAD SERIES DESIGNATORUNF
MATERIALCOPPER ALLOY 360
SPECIFICATION/STANDARD DATA81343-J512 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
STYLE DESIGNATORINVERTED NUT, TUBE, FLARE
MATERIAL DOCUMENT AND CLASSIFICATIONSAE CA360, 1/2H ASSN STD SINGLE MATERIAL RESPONSE
WIDTH ACROSS FLATS0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.188 INCHES NOMINAL IN
OVERALL LENGTH0.563 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA9 FIGURE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
121400Interchangeable
interchangeable cross-reference
interchangeable
100-4Interchangeable
interchangeable cross-reference
interchangeable
100-10528Interchangeable
interchangeable cross-reference
interchangeable
53668Interchangeable
interchangeable cross-reference
interchangeable
53668AInterchangeable
interchangeable cross-reference
interchangeable
C746516-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 53668?
53668 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 53668?
There are 17 known substitutes for 53668: 121400, 100-4, 100-10528 and 14 more. Substitute compatibility should be verified for your specific system.
Is 53668 still available?
53668 is currently cancelled.
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