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173804 — GEAR,BEVEL

✓ Government record, cited
Trevi · COMPONENT
PRODUCT OVERVIEW

173804: GEAR,BEVEL.

The GEAR,BEVEL is a Trevi industrial component. Key specifications include hole_diameter: 1.163 INCHES MINIMUM AND 1.175 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.013 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: NAVY SPECIAL PROJECT. This part is cataloged in the U.S.

Government catalog under NSN 3020-00-477-7978, 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
173804
NSN: 3020-00-477-7978
NIINs: 004777978, 005609971, 015122100
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 30076 — HYSTER-YALE GROUP, INC. (USA)
SPECIFICATIONS
hole_diameter1.163 INCHES MINIMUM AND 1.175 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentPASSIVATE OVERALL
material_thickness0.013 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN3020-00-477-7978
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Trevi GEAR,BEVEL TITLE COMPONENT PN 173804 MFR Trevi GEAR,BEVEL
KEY FEATURES
•
BORE NOMINAL DIAMETER: 1.063 INCHES BOTH ENDS IN
•
TEETH QUANTITY: 9
•
BODY STYLE: PLAIN, SOLID
•
BORE STYLE: PLAIN BOTH ENDS
•
TEETH TYPE: HYPOID
•
NOMINAL OVERALL LENGTH: 1.2656 INCHES IN
•
STYLE DESIGNATOR: PERIPHERAL FACE, HUBLESS
•
PITCH DIAMETER: 2.7500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BORE NOMINAL DIAMETER1.063 INCHES BOTH ENDS IN
TEETH QUANTITY9
BODY STYLEPLAIN, SOLID
BORE STYLEPLAIN BOTH ENDS
TEETH TYPEHYPOID
NOMINAL OVERALL LENGTH1.2656 INCHES IN
STYLE DESIGNATORPERIPHERAL FACE, HUBLESS
PITCH DIAMETER2.7500 INCHES NOMINAL IN
NOMINAL OUTSIDE DIAMETER3.2500 INCHES IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
87979-A02T-16Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2233U151Reference 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 173804?
173804 is a GEAR,BEVEL manufactured by Trevi.
What parts can replace 173804?
There are 2 known substitutes for 173804: 87979-A02T-16, 2233U151. Substitute compatibility should be verified for your specific system.
What is the NSN for 173804?
173804 is cataloged in the U.S. Government catalog under NSN 3020-00-477-7978. 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.