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11B4550056 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

11B4550056: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, overall_length: 20.9 INCHES NOMINAL IN, operating_pressure: 2250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 0.25 INCHES FIRST FLUID END CONNECTION IN, end_item_identification: NSN 4940-016270524, nominal_outside_diameter: 1.02 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-673-5891, 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
11B4550056
NSN: 4730-01-673-5891
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 5B5M3 — DEVCOM CHEMICAL BIOLOGICAL CENTER DBA CHEMICAL BIOLOGICAL CENTER DIV U.S. DEPT OF ARMY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
overall_length20.9 INCHES NOMINAL IN
operating_pressure2250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.25 INCHES FIRST FLUID END CONNECTION IN
end_item_identificationNSN 4940-016270524
nominal_outside_diameter1.02 INCHES IN
thread_quantity_per_inchA18 FIRST FLUID END CONNECTION
nominal_width_across_flats0.88 INCHES IN
specification/standard_dataASME Y14.100-2017 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND ASME Y14.5-2009 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
part_name_assigned_by_controlling_agencyQUICK COUPLER
NSN4730-01-673-5891
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 11B4550056 · 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
•
NOMINAL WIDTH ACROSS FLATS: 0.88 INCHES IN
•
OPERATING PRESSURE: 2250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NOMINAL THREAD SIZE: 0.25 INCHES FIRST FLUID END CONNECTION IN
•
SPECIFICATION/STANDARD DATA: ASME Y14.100-2017 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND ASME Y14.5-2009 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
NOMINAL OUTSIDE DIAMETER: 1.02 INCHES IN
TECHNICAL CHARACTERISTICS
NOMINAL WIDTH ACROSS FLATS0.88 INCHES IN
OVERALL LENGTH20.9 INCHES NOMINAL IN
OPERATING PRESSURE2250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NOMINAL THREAD SIZE0.25 INCHES FIRST FLUID END CONNECTION IN
SPECIFICATION/STANDARD DATAASME Y14.100-2017 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND ASME Y14.5-2009 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NOMINAL OUTSIDE DIAMETER1.02 INCHES IN
PART NAME ASSIGNED BY CONTROLLING AGENCYQUICK COUPLER
END ITEM IDENTIFICATIONNSN 4940-016270524
THREAD QUANTITY PER INCHA18 FIRST FLUID END CONNECTION
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 1
BVHC4-4MReference document
Same NSN cross-reference
Reference document — Secondary reference
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 11B4550056?
11B4550056 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 11B4550056?
There is 1 known substitute for 11B4550056: BVHC4-4M. Substitute compatibility should be verified for your specific system.
What is the NSN for 11B4550056?
11B4550056 is cataloged in the U.S. Government catalog under NSN 4730-01-673-5891. 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.