The Gear,spur, cataloged under National Stock Number 3020-00-381-5604, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 27 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-381-5604 |
| Primary Part Number | 493618PC1 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Keyway Nominal Width | 0.1562 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.8753 INCHES BOTH ENDS IN |
| Teeth Quantity | 128 |
| Second Step Nominal Diameter | 7.000 INCHES FIRST END IN |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Mounting Hole Type and Quantity | 6 THREADED AXIALLY THROUGH BODY SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.640 INCHES FIRST END IN |
| First Step Nominal Length | 0.796 INCHES FIRST END IN |
| Second Step Nominal Length | 0.032 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 7.9980 INCHES MINIMUM AND 8.0000 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 4.625 INCHES FIRST END IN |
| Hub Style Designator | 2 STEPS FIRST END |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH BODY SECOND END IN |
| End Nominal Length | 0.812 INCHES FIRST END IN |
| Nominal Outside Diameter | 8.1210 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.5315 INCHES BOTH ENDS IN |
| End Nominal Diameter | 3.750 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Bolt Hole Circle Nominal Diameter | 4.750 INCHES AXIALLY THROUGH BODY SECOND END IN |
| Mounting Hole Thread Series Designator | UNF AXIALLY THROUGH BODY SECOND END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.343 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 493618PC1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-381-5604 is a Gear,spur, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-381-5604 has 1 manufacturer part number on file: 493618PC1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 493618PC1: Keyway Nominal Width: 0.1562 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.8753 INCHES BOTH ENDS IN; Teeth Quantity: 128; Second Step Nominal Diameter: 7.000 INCHES FIRST END IN. 27 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.