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PartsTable / COMPONENT / M2643E
M2643E ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL OVERALL, flow_angle: 45.0 DEGREES, leg_length: 1.109 INCHES MINIMUM AND 1.171 INCHES MAXIMUM SECOND END IN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS SECOND END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-679-9766, 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
M2643E
NSN: 4730-00-679-9766
FSC: 4730
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flow_angle45.0 DEGREES
leg_length1.109 INCHES MINIMUM AND 1.171 INCHES MAXIMUM SECOND END IN
seat_angle37.0 DEGREES FIRST END
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleFLARED (TUBE) FIRST END
surface_treatmentCADMIUM OUTSIDE
nominal_thread_size0.562 INCHES ALL ENDS IN
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity1 LOCKNUT AND 1 PREFORMED PACKING AND 1 FLAT WASHER
nominal_outside_diameter_tube_accommodated0.375 INCHES FIRST END IN
NSN4730-00-679-9766
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: M2643E · 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 32
16567Interchangeable
interchangeable cross-reference
interchangeable
LT1-1207Interchangeable
interchangeable cross-reference
interchangeable
2061T-8-8SInterchangeable
interchangeable cross-reference
interchangeable
20356FXInterchangeable
interchangeable cross-reference
interchangeable
4BCAYWInterchangeable
interchangeable cross-reference
interchangeable
4-4 070320CAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M2643E?
M2643E is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace M2643E?
There are 32 known substitutes for M2643E: 16567, LT1-1207, 2061T-8-8S and 29 more. Substitute compatibility should be verified for your specific system.
Is M2643E still available?
M2643E 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