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504165 ✓ 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: STEEL COMP 347 OVERALL, seat_angle: 45.0 DEGREES, thread_class: 3A EXTERNAL A, thread_length: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM EXTERNAL IN, exterior_color: BLUE OVERALL, thread_direction: RIGHT-HAND EXTERNAL. 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
504165
NSN: 4730-00-737-2343
FSC: 4730
CAGE: 23705 — FRUEHAUF CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 347 OVERALL
seat_angle45.0 DEGREES
thread_class3A EXTERNAL A
thread_length0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM EXTERNAL IN
exterior_colorBLUE OVERALL
thread_directionRIGHT-HAND EXTERNAL
surface_treatmentSILVER OVERALL
nominal_thread_size0.250 INCHES EXTERNAL IN
thread_quantity_per_inch28 EXTERNAL
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) EXTERNAL
material_document_and_classificationAMS 5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-737-2343
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 504165 · 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 8
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
FC5778Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 504165?
504165 is a CONNECTOR,MULTIPLE,FLUID PRESSUR.
What parts can replace 504165?
There are 8 known substitutes for 504165: 1120672, 504165, 637432 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 504165?
504165 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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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026