PartsTable
Technical Data Sheet
FC5778 ✓ 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,MULTIPLE,FLUID PRESSUR. Key specifications include material: COPPER ALLOY, thickness: 0.563 INCHES NOMINAL IN, thread_size: 3/8 IN.-24 SECOND CONNECTION IN, thread_class: 2B SECOND CONNECTION, overall_width: 0.875 INCHES NOMINAL IN, overall_length: 1.313 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-737-2343, 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
FC5778
NSN: 4730-00-737-2343
FSC: 4730
CAGE: 63477 — FEDERAL MOGUL CORP SUB WAGNER BRAKE MOOG AUTOMOTIVE DIV (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.563 INCHES NOMINAL IN
thread_size3/8 IN.-24 SECOND CONNECTION IN
thread_class2B SECOND CONNECTION
overall_width0.875 INCHES NOMINAL IN
overall_length1.313 INCHES NOMINAL IN
connection_styleINVERTED FLARE FIRST CONNECTION
style_designator3 FLUID CONNECTIONS
thread_directionRIGHT-HAND SECOND CONNECTION
seat_angle_in_deg42.0 LOCATION NOT OTHERWISE SPECIFIED
bolt_hole_diameter0.282 INCHES NOMINAL IN
deg_between_outlets90.0
NSN4730-00-737-2343
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: FC5778 · 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
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED: 3/16 IN. OD TUBE; 3/8 IN. NOM HOSE IN
CONNECTION STYLE: PLAIN SECOND CONNECTION
THREAD DIRECTION: RIGHT-HAND SECOND CONNECTION
DEG BETWEEN OUTLETS: 90.0
FLUID CONNECTION QUANTITY: 1 SECOND CONNECTION
BOLT HOLE FLUID PASSAGE: NOT PROVIDED
SEAT ANGLE IN DEG: 42.0 LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS (FLIS)
FLUID CONVEYANCE TYPE AND SIZE FOR WHICH DESIGNED3/16 IN. OD TUBE; 3/8 IN. NOM HOSE IN
CONNECTION STYLEPLAIN SECOND CONNECTION
THREAD DIRECTIONRIGHT-HAND SECOND CONNECTION
DEG BETWEEN OUTLETS90.0
FLUID CONNECTION QUANTITY1 SECOND CONNECTION
THREAD DIRECTIONRIGHT-HAND FIRST CONNECTION
BOLT HOLE FLUID PASSAGENOT PROVIDED
SEAT ANGLE IN DEG42.0 LOCATION NOT OTHERWISE SPECIFIED
BOLT HOLE DIAMETER0.282 INCHES NOMINAL IN
THICKNESS0.563 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
1120672Interchangeable
interchangeable cross-reference
interchangeable
504165Interchangeable
interchangeable cross-reference
interchangeable
637432Interchangeable
Same NIIN cross-reference
interchangeable
GP2074Interchangeable
Same NIIN cross-reference
interchangeable
7372343Interchangeable
Same NIIN cross-reference
interchangeable
KZ271Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FC5778?
FC5778 is a CONNECTOR,MULTIPLE,FLUID PRESSUR.
What parts can replace FC5778?
There are 7 known substitutes for FC5778: 1120672, 504165, 637432 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FC5778?
FC5778 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-737-2343. This indicates validated use in U.S. government and defense supply chains.
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