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4DS4-B — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4DS4-B: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, connection_type: UNTHREADED EXTERNAL HOSE SECOND QUICK DISCONNECT END, connection_style: BARBED OR SERRATED END SECOND QUICK DISCONNECT END, style_designator: FEMALE COUPLING HALF, operating_pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, part_name_assigned_by_controlling_agency: DF-SERIES INDUSTRIAL AUTOMATIC COUPLER STANDARD HOSE BARB. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-656-3173, 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
4DS4-B
NSN: 4730-01-656-3173
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 61125 — ECHELON SUPPLY AND SERVICE, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
connection_typeUNTHREADED EXTERNAL HOSE SECOND QUICK DISCONNECT END
connection_styleBARBED OR SERRATED END SECOND QUICK DISCONNECT END
style_designatorFEMALE COUPLING HALF
operating_pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
part_name_assigned_by_controlling_agencyDF-SERIES INDUSTRIAL AUTOMATIC COUPLER STANDARD HOSE BARB
nominal_inside_diameter_hose_accommodated0.500 INCHES SECOND QUICK DISCONNECT END IN
NSN4730-01-656-3173
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4DS4-B · 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 STYLE: BARBED OR SERRATED END SECOND QUICK DISCONNECT END
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.500 INCHES SECOND QUICK DISCONNECT END IN
•
CONNECTION TYPE: UNTHREADED EXTERNAL HOSE SECOND QUICK DISCONNECT END
•
STYLE DESIGNATOR: FEMALE COUPLING HALF
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MATERIAL: RUBBER SYNTHETIC GASKET
TECHNICAL CHARACTERISTICS
CONNECTION STYLEBARBED OR SERRATED END SECOND QUICK DISCONNECT END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.500 INCHES SECOND QUICK DISCONNECT END IN
CONNECTION TYPEUNTHREADED EXTERNAL HOSE SECOND QUICK DISCONNECT END
STYLE DESIGNATORFEMALE COUPLING HALF
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
PART NAME ASSIGNED BY CONTROLLING AGENCYDF-SERIES INDUSTRIAL AUTOMATIC COUPLER STANDARD HOSE BARB
MATERIALRUBBER SYNTHETIC GASKET
MATERIALCOPPER ALLOY OVERALL
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4DS4-B?
4DS4-B is a COUPLING HALF,QUICK DISCONNECT.
What is the NSN for 4DS4-B?
4DS4-B is cataloged in the U.S. Government catalog under NSN 4730-01-656-3173. 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.