The Gear,bevel, cataloged under National Stock Number 3020-01-018-1822, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Todd Combustion Inc. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 3020-01-018-1822 |
| Primary Part Number | 21978 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — No Item Name Available |
| Manufacturer | Todd Combustion Inc |
| Status | CANCELLED |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Type and Quantity | 3 THREADED AXIALLY THROUGH BODY FIRST END |
| Teeth Quantity | 60 |
| Pitch Diameter | 6.0000 INCHES NOMINAL IN |
| Nominal Outside Diameter | 6.060 INCHES IN |
| Teeth Type | STRAIGHT |
| Pitch Angle | 15.0000 DEGREES |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Material | STEEL OVERALL |
| Hub Style Designator | PLAIN SECOND END |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Bore Nominal Diameter | 4.015 INCHES BOTH ENDS IN |
| Bore Style | PLAIN BOTH ENDS |
| Bolt Hole Circle Nominal Diameter | 5.158 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Hub Nominal Diameter | 4.473 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES SECOND END IN |
| Face Nominal Width | 0.517 INCHES IN |
| Nominal Overall Length | 2.000 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Attachment Method | MOUNTING HOLE |
| Body Style | PLAIN, WITH LIGHTENING HOLES |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| N49704PC18 | Todd Combustion Inc (USA) |
| 21978 PRIMARY | Todd Combustion Inc (USA) |
| DD936-S5501-1499308 | Naval Ship Systems Command (USA) |
| N46640PC18 | Todd Combustion Inc (USA) |
| N49677PC18 | Todd Combustion Inc (USA) |
| DD936-S5501-1499308PC18 | Naval Ship Systems Command (USA) |
| ND40069PC18 | Todd Combustion Inc (USA) |
| G3-4-3 PRIMARY | Todd Combustion Inc (USA) |
| DD936-S5501-149 | Naval Ship Systems Command (USA) |
NSN 3020-01-018-1822 is a Gear,bevel, manufactured by Todd Combustion Inc, classified under FSC 3020 (No Item Name Available). Status: cancelled.
NSN 3020-01-018-1822 has 9 cross-referenced part numbers: N49704PC18 (Todd Combustion Inc), 21978 (Todd Combustion Inc), DD936-S5501-1499308 (Naval Ship Systems Command), N46640PC18 (Todd Combustion Inc), N49677PC18 (Todd Combustion Inc) and 4 more.
There are 8 known substitutes for 3020-01-018-1822: 1650-00-123-0272, 4820-00-139-5425, 5330-00-154-0903 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21978: Mounting Hole Nominal Thread Size: 0.250 INCHES AXIALLY THROUGH BODY FIRST END IN; Mounting Hole Type and Quantity: 3 THREADED AXIALLY THROUGH BODY FIRST END; Teeth Quantity: 60; Pitch Diameter: 6.0000 INCHES NOMINAL IN. 21 total characteristics are documented in the Federal Logistics Information System.
NSN 3020-01-018-1822 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.