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504387 — TERMINAL BOARD ASSEMBLY

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

504387: TERMINAL BOARD ASSEMBLY.

The TERMINAL BOARD ASSEMBLY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 360 OVERALL, seat_angle: 20.000 DEGREES ALL ENDS, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: INVERTED FLARE (TUBE) ALL ENDS, style_designator: FLARELESS W/ CENTER WRENCHING FACILITY. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-278-3217, 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
504387
NSN: 4730-00-278-3217
NIINs: 002783217, 014294251
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0T0Y2 — CME ARMA, INC. DBA CME ARMA INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
seat_angle20.000 DEGREES ALL ENDS
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleINVERTED FLARE (TUBE) ALL ENDS
style_designatorFLARELESS W/ CENTER WRENCHING FACILITY
nominal_thread_size0.812 INCHES ALL ENDS IN
nominal_overall_length1.437 INCHES IN
end_item_identification5820-01-387-4520
thread_quantity_per_inch1.8 ALL ENDS
thread_series_designatorUNS ALL ENDS
furnished_items_and_quantity2 FLARED SLEEVE AND 2 SHORT COUPLING NUT
NSN4730-00-278-3217
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 504387 · 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
•
FURNISHED ITEMS AND QUANTITY: 2 FLARED SLEEVE AND 2 SHORT COUPLING NUT
•
CONNECTION STYLE: INVERTED FLARE (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.437 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: FLARELESS W/ CENTER WRENCHING FACILITY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626,COMP 22,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.625 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.812 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY2 FLARED SLEEVE AND 2 SHORT COUPLING NUT
CONNECTION STYLEINVERTED FLARE (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH1.437 INCHES IN
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
STYLE DESIGNATORFLARELESS W/ CENTER WRENCHING FACILITY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,COMP 22,1/2 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.625 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.812 INCHES ALL ENDS IN
SEAT ANGLE20.000 DEGREES ALL ENDS
DEPARTURE FROM CITED DESIGNATORAS DIFFERENTIATED BY FURNISHED ITEMS
SUBSTITUTES & CROSS-REFERENCES 1
4730002783217Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 504387?
504387 is a TERMINAL BOARD ASSEMBLY.
What parts can replace 504387?
There is 1 known substitute for 504387: 4730002783217. Substitute compatibility should be verified for your specific system.
What is the NSN for 504387?
504387 is cataloged in the U.S. Government catalog under NSN 4730-00-278-3217. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.