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3504743 — COUPLING,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3504743: COUPLING,PIPE.

The COUPLING,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL STAINLESS - USE STB000 BODY, nominal_width: 1.880 INCHES ALL ENDS IN, connection_type: GROOVED COUPLING ALL ENDS, operating_pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 0.380 INCHES ALL ENDS IN, end_item_identification: 4210-01-622-0440, TRUCK, FIRE FIGHTING. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-646-6121, 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
3504743
NSN: 4730-01-646-6121
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 6YNL6 — STAINLESS FLOW TECHNOLOGIES, INC. DIV STAINLESS FLOW TECHNOLOGIES INC (USA)
SPECIFICATIONS
materialSTEEL STAINLESS - USE STB000 BODY
nominal_width1.880 INCHES ALL ENDS IN
connection_typeGROOVED COUPLING ALL ENDS
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.380 INCHES ALL ENDS IN
end_item_identification4210-01-622-0440, TRUCK, FIRE FIGHTING
nominal_outside_diameter4.500 INCHES ALL ENDS IN
thread_quantity_per_inch16 ALL ENDS
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) ALL ENDS
nominal_coupling_size_accommodated3.000 INCHES ALL ENDS IN
part_name_assigned_by_controlling_agencyCOUPLING, 3.00 PIPE GROOVE
NSN4730-01-646-6121
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3504743 · 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
•
CONNECTION TYPE: GROOVED COUPLING ALL ENDS
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL THREAD SIZE: 0.380 INCHES ALL ENDS IN
•
NOMINAL OUTSIDE DIAMETER: 4.500 INCHES ALL ENDS IN
•
NOMINAL WIDTH: 1.880 INCHES ALL ENDS IN
•
NOMINAL COUPLING SIZE ACCOMMODATED: 3.000 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION TYPEGROOVED COUPLING ALL ENDS
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE0.380 INCHES ALL ENDS IN
NOMINAL OUTSIDE DIAMETER4.500 INCHES ALL ENDS IN
NOMINAL WIDTH1.880 INCHES ALL ENDS IN
PART NAME ASSIGNED BY CONTROLLING AGENCYCOUPLING, 3.00 PIPE GROOVE
END ITEM IDENTIFICATION4210-01-622-0440, TRUCK, FIRE FIGHTING
NOMINAL COUPLING SIZE ACCOMMODATED3.000 INCHES ALL ENDS IN
THREAD QUANTITY PER INCH16 ALL ENDS
MATERIALRUBBER SYNTHETIC GASKET
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 3504743?
3504743 is a COUPLING,PIPE.
What is the NSN for 3504743?
3504743 is cataloged in the U.S. Government catalog under NSN 4730-01-646-6121. 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.