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PartsTable / COMPONENT / 1787810-4
1787810-4 ✓ 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

SLEEVE,COMPRESSION,TUBE-HOSE FIT. Key specifications include body_width: 2.500 INCHES NOMINAL IN, body_height: 4.250 INCHES NOMINAL IN, body_length: 5.938 INCHES MINIMUM AND 6.062 INCHES MAXIMUM IN, inclosure_type: HERMETICALLY SEALED, overall_height: 6.062 INCHES NOMINAL IN, style_designator: RECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-321-6143, 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
1787810-4
NSN: 4730-00-321-6143
FSC: 4730
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
body_width2.500 INCHES NOMINAL IN
body_height4.250 INCHES NOMINAL IN
body_length5.938 INCHES MINIMUM AND 6.062 INCHES MAXIMUM IN
inclosure_typeHERMETICALLY SEALED
overall_height6.062 INCHES NOMINAL IN
style_designatorRECTANGULAR TERMINAL/TERMINALS ON OPPOSITE SURFACES
nominal_thread_size0.190 INCHES IN
operating_temp_range-55.0 TO 85.0 CELSIUS DEGC
load_impedance_per_function50.0 OHMS 2ND RADIO INTERFERENCE SECOND FUNCTION
input_terminal_identificationMS3102E18-11P
input_terminal_manufacturer_code96906
maximum_voltage_drop_per_function1.25 VOLTS AC 1ST RADIO INTERFERENCE FIRST FUNCTION
NSN4730-00-321-6143
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1787810-4 · 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 23
8081B0440-3BInterchangeable
interchangeable cross-reference
interchangeable
9051Interchangeable
interchangeable cross-reference
interchangeable
1656Interchangeable
interchangeable cross-reference
interchangeable
2222-9Interchangeable
interchangeable cross-reference
interchangeable
C600012890Interchangeable
interchangeable cross-reference
interchangeable
501718Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1787810-4?
1787810-4 is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace 1787810-4?
There are 23 known substitutes for 1787810-4: 8081B0440-3B, 9051, 1656 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1787810-4?
1787810-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-321-6143. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026