The Gear Sector,bevel, cataloged under National Stock Number 3020-01-152-9289, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-152-9289 |
| Item Name | Gear Sector,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.750 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 4.250 INCHES SECOND END IN |
| Teeth Quantity | 48 |
| Nominal Outside Radius | 3.066 INCHES IN |
| Pitch Angle | 58.0000 DEGREES |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 PLAIN AXIALLY THROUGH HUB SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.375 INCHES SECOND END IN |
| Mounting Hole Nominal Diameter | 0.750 INCHES AXIALLY THROUGH HUB SECOND END IN |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 1.356 INCHES IN |
| Style Designator | SIDE FACE, FRONT HUB FLUSH, BACK HUB PROTRUDING |
| Material Document and Classification | 66AISI/SAE4140 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Hub Style Designator | PLAIN SECOND END |
| Pitch Radius | 3.0000 INCHES NOMINAL IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.750 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 |
| Reference | Meaning |
|---|---|
| SSN637-501-2159964 | D/9 Drawing number reference only U.S. Government activity |
| 77643-42X9 PIECE 1 | 3/2 Design control — primary reference U.S. Government activity |
| SSN637-501-2159964 PIECE 1 | 3/2 Design control — primary reference U.S. Government activity |
| 77643-42X9 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-152-9289 is a Gear Sector,bevel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-156-9992. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-152-9289: Bore Nominal Diameter: 1.750 INCHES BOTH ENDS IN; Hub Nominal Diameter: 4.250 INCHES SECOND END IN; Teeth Quantity: 48; Nominal Outside Radius: 3.066 INCHES IN. 19 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.