PartsTable TECHNICAL DATA SHEET
NSN 3020-00-804-8773Government record, cited

Gear, Helical3020-00-804-8773

NSN 3020-00-804-8773 · NIIN 008048773 · Part number 502D299
Westinghouse Electric Corp · FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain · FSG 30 — Mechanical Power Transmission Equipment · CAGE 79500
Government record, cited
NSN 3020-00-804-8773 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-804-8773. Manufacturer of record part number: 502D299.
Also searched as  3020-00-804-8773 · 3020008048773 · NIIN 008048773 · 00-804-8773 · FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · CAGE 79500 · 502D299 · 502D299-1 · 502D299-1
Nearby stock numbers  ·
Features
  • Gear,helical — FSC 3020
  • Keyway Nominal Width: 0.374 INCHES BOTH ENDS IN
  • Teeth Quantity: 29
  • Body Style: PLAIN, SOLID
  • Counterbore Nominal Diameter: 2.3125 INCHES FIRST END IN
  • Tooth Direction: RIGHT
  • Teeth Type: SINGLE HELIX
  • Style Designator: HUBLESS
Identification
  • NSN: 3020-00-804-8773
  • NIIN: 008048773
  • FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
  • FSG: 30 — Mechanical Power Transmission Equipment
  • Primary part number: 502D299
  • Manufacturer: Westinghouse Electric Corp
General Description

The Gear,helical, cataloged under National Stock Number 3020-00-804-8773, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-804-8773
Primary Part Number502D299
Item NameGear,helical
FSC / FSG3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
ManufacturerWestinghouse Electric Corp
StatusACTIVE
Keyway Nominal Width0.374 INCHES BOTH ENDS IN
Teeth Quantity29
Body StylePLAIN, SOLID
Counterbore Nominal Diameter2.3125 INCHES FIRST END IN
Tooth DirectionRIGHT
Teeth TypeSINGLE HELIX
Style DesignatorHUBLESS
Material Document and ClassificationMIL-S-890,CLASS BS MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Pitch Diameter3.3124 INCHES NOMINAL IN
Tooth FormSTANDARD
Nominal Outside Diameter3.5124 INCHES IN
Pressure Angle20.0000 DEGREES
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
502D299 Westinghouse Electric Corp (USA)
502D299-1 Westinghouse Electric Corp (USA)
Reference documents
ReferenceMeaning
502D299-1 3/9 Design control — primary reference
Westinghouse Electric Corp Control Business Unit
No interchangeability data on file.
Other items in FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3020-00-000-0091
GEAR,SPUR
3020-00-001-0027
3020-00-001-0027 · Item name not on file
3020-00-001-0028
3020-00-001-0028 · Item name not on file
3020-00-001-0063
3020-00-001-0063 · Item name not on file
3020-00-001-0064
3020-00-001-0064 · Item name not on file
3020-00-001-0066
3020-00-001-0066 · Item name not on file
3020-00-001-0071
3020-00-001-0071 · Item name not on file
3020-00-001-0072
3020-00-001-0072 · Item name not on file

Frequently Asked Questions

What is NSN 3020-00-804-8773?

NSN 3020-00-804-8773 is a Gear,helical, manufactured by Westinghouse Electric Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.

What part numbers are listed for NSN 3020-00-804-8773?

NSN 3020-00-804-8773 has 2 manufacturer part numbers on file: 502D299 (Westinghouse Electric Corp), 502D299-1 (Westinghouse Electric Corp).

What are the specifications of 502D299?

Key specifications for 502D299: Keyway Nominal Width: 0.374 INCHES BOTH ENDS IN; Teeth Quantity: 29; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 2.3125 INCHES FIRST END IN. 13 specifications are documented in the U.S. Government catalog.

Is NSN 3020-00-804-8773 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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