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43831-21 — GEAR CLUSTER

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

43831-21: GEAR CLUSTER.

The GEAR CLUSTER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416 OVERALL, design_type: SPUR SECOND GEAR, construction: ASSEMBLED, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL, surface_treatment: PASSIVATE OVERALL, hub_nominal_length: 0.776 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 3020-00-089-8116, 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
43831-21
NSN: 3020-00-089-8116
NIINs: 000898116, 011374823
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 37695 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 416 OVERALL
design_typeSPUR SECOND GEAR
constructionASSEMBLED
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
surface_treatmentPASSIVATE OVERALL
hub_nominal_length0.776 INCHES SECOND END IN
hub_nominal_diameter0.124 INCHES BOTH ENDS IN
hub_style_designator1 STEP BOTH ENDS
nominal_overall_length1.328 INCHES IN
nominal_outside_diameter0.269 INCHES SECOND GEAR IN
material_document_and_classificationQQ-S-763,CLASS 416 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN3020-00-089-8116
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GEAR CLUSTER TITLE COMPONENT PN 43831-21 MFR GEAR CLUSTER
KEY FEATURES
•
HUB NOMINAL DIAMETER: 0.124 INCHES BOTH ENDS IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DESIGN TYPE: SPUR SECOND GEAR
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
NOMINAL OVERALL LENGTH: 1.328 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,CLASS 416 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
HUB STYLE DESIGNATOR: 1 STEP BOTH ENDS
TECHNICAL CHARACTERISTICS
HUB NOMINAL DIAMETER0.124 INCHES BOTH ENDS IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
DESIGN TYPESPUR SECOND GEAR
DESIGN TYPESPUR FIRST GEAR
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL OVERALL LENGTH1.328 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,CLASS 416 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
HUB STYLE DESIGNATOR1 STEP BOTH ENDS
HUB NOMINAL LENGTH0.123 INCHES FIRST END IN
HUB NOMINAL LENGTH0.776 INCHES SECOND END IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 43831-21?
43831-21 is a GEAR CLUSTER.
What is the NSN for 43831-21?
43831-21 is cataloged in the U.S. Government catalog under NSN 3020-00-089-8116. 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.