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PartsTable / COMPONENT / SAE J512 3 040110B
SAE J512 3 040110B ✓ 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 INVERTED NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360, thread_size: 3/8-24, thread_class: 2A A, overall_length: 0.563 INCHES NOMINAL IN, style_designator: INVERTED NUT, TUBE, FLARE, thread_direction: RIGHT-HAND. 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
SAE J512 3 040110B
NSN: 4730-00-014-2431
FSC: 4730
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360
thread_size3/8-24
thread_class2A A
overall_length0.563 INCHES NOMINAL IN
style_designatorINVERTED NUT, TUBE, FLARE
thread_directionRIGHT-HAND
seat_angle_in_deg45.0
width_across_flats0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
smallest_inside_diameter0.194 INCHES MINIMUM AND 0.199 INCHES MAXIMUM IN
nondefinitive_spec/std_data9 FIGURE
specification/standard_data81343-J512 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-014-2431
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: SAE J512 3 040110B · 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 16
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 SAE J512 3 040110B?
SAE J512 3 040110B is a INVERTED NUT,TUBE COUPLING.
What parts can replace SAE J512 3 040110B?
There are 16 known substitutes for SAE J512 3 040110B: 121400, 100-4, 100-10528 and 13 more. Substitute compatibility should be verified for your specific system.
Is SAE J512 3 040110B still available?
SAE J512 3 040110B is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026