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Technical Data Sheet
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GS1221 — REDUCER,TUBE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

GS1221: REDUCER,TUBE.

The REDUCER,TUBE is a the manufacturer industrial component. Key specifications include end_item_identification: HAMILTON STANDARD HYDRAULIC PROPELLER TESTER GS1221, nominal_outside_diameter_tube_accommodated: 0.500 INCHES FIRST END IN. This part is cataloged in the U.S.

Government catalog under NSN 4920-00-474-3234, 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
GS1221
NSN: 4920-00-474-3234
NIINs: 004743234, 013822825
FSC: 4920 — Aircraft Maintenance and Repair Shop Specialized Equipment
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
end_item_identificationHAMILTON STANDARD HYDRAULIC PROPELLER TESTER GS1221
nominal_outside_diameter_tube_accommodated0.500 INCHES FIRST END IN
NSN4920-00-474-3234
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available REDUCER,TUBE TITLE COMPONENT PN GS1221 MFR REDUCER,TUBE
SUBSTITUTES & CROSS-REFERENCES 1
4920PL1150224Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedDemilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is GS1221?
GS1221 is a REDUCER,TUBE.
What parts can replace GS1221?
There is 1 known substitute for GS1221: 4920PL1150224. Substitute compatibility should be verified for your specific system.
What is the NSN for GS1221?
GS1221 is cataloged in the U.S. Government catalog under NSN 4920-00-474-3234. 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.