The Gear,helical, cataloged under National Stock Number 3020-01-194-2132, 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 Continental Emsco Co Skagit Products Div. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-194-2132 |
| Primary Part Number | RC-8421 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Continental Emsco Co Skagit Products Div |
| Status | ACTIVE |
| Keyway Nominal Width | 0.750 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 3.500 INCHES BOTH ENDS IN |
| Helix Angle | 16.5000 DEGREES |
| Teeth Quantity | 75 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Counterbore Nominal Diameter | 4.001 INCHES COUNTERBORE FIRST END IN |
| Tooth Direction | RIGHT |
| Bore Style | W/COUNTERBORE COUNTERBORE FIRST END |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | HUBLESS |
| Pitch Diameter | 19.5550 INCHES NOMINAL IN |
| Nominal Outside Diameter | 19.955 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 2.125 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Counterbore Nominal Depth | 0.250 INCHES COUNTERBORE FIRST END IN |
| Face Nominal Width | 3.375 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 |
|---|---|
| 51863H PIECE 19 | Continental Emsco Co Skagit Products Div (USA) |
| RC-8421 PRIMARY | Continental Emsco Co Skagit Products Div (USA) |
NSN 3020-01-194-2132 is a Gear,helical, manufactured by Continental Emsco Co Skagit Products Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-194-2132 has 2 manufacturer part numbers on file: 51863H PIECE 19 (Continental Emsco Co Skagit Products Div), RC-8421 (Continental Emsco Co Skagit Products Div).
Key specifications for RC-8421: Keyway Nominal Width: 0.750 INCHES BOTH ENDS IN; Bore Nominal Diameter: 3.500 INCHES BOTH ENDS IN; Helix Angle: 16.5000 DEGREES; Teeth Quantity: 75. 18 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.