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221661 — COUPLING,SHAFT,FLEXIBLE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

221661: COUPLING,SHAFT,FLEXIBLE.

The COUPLING,SHAFT,FLEXIBLE is a the manufacturer industrial component. Key specifications include shape: ROUND, frame_type: ROUND, special_features: MATERIAL: MONEL, frame_overall_diameter: 6.313 INCHES NOMINAL IN, end_item_identification: PLO-125 REMOTE ACTUATOR. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-018-9566, 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
221661
NSN: 4730-00-018-9566
NIINs: 000189566, 009301738, 012278849, 015239207, 015550514
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
shapeROUND
frame_typeROUND
special_featuresMATERIAL: MONEL
frame_overall_diameter6.313 INCHES NOMINAL IN
end_item_identificationPLO-125 REMOTE ACTUATOR
NSN4730-00-018-9566
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 221661 · 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
SUBSTITUTES & CROSS-REFERENCES 10
AE230Reference document
Same NSN cross-reference
Reference document — Secondary reference
84-01310-03Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
217629Reference document
Same NSN cross-reference
Reference document — Secondary reference
570953C1Reference document
Same NSN cross-reference
Reference document — Secondary reference
Y18802Reference document
Same NSN cross-reference
Reference document — Secondary reference
444687Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 221661?
221661 is a COUPLING,SHAFT,FLEXIBLE.
What parts can replace 221661?
There are 10 known substitutes for 221661: AE230, 84-01310-03, 217629 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 221661?
221661 is cataloged in the U.S. Government catalog under NSN 4730-00-018-9566. 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.