The Gear,bevel, cataloged under National Stock Number 3020-01-149-6764, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-149-6764 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.248 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.187 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.956 INCHES SECOND END IN |
| Backlash Designation | GRADE D |
| Nominal Distance Between Body Face and Recessed Hub End | 0.019 INCHES FIRST END IN |
| Teeth Quantity | 40 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 45.0000 DEGREES |
| Bore Style | STRAIGHT SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.187 INCHES SECOND END IN |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 1.144 INCHES IN |
| Style Designator | SIDE FACE, FRONT HUB RECESSED, BACK HUB PROTRUDING |
| Material Document and Classification | 66AISI/SAE4140 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 10 BOTH ENDS |
| Nominal Outside Diameter | 5.112 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Face Nominal Width | 1.000 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 |
|---|---|
| SSN637-501-2143837 | D/9 Drawing number reference only U.S. Government activity |
| 77643-93X3 PIECE 8 | 5/2 Secondary reference U.S. Government activity |
| 77643-93X3 | D/9 Drawing number reference only U.S. Government activity |
| SSN637-501-2143837 PIECE 8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-149-6764 is a Gear,bevel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 3040-01-150-1770, 4810-01-151-3834, 3020-01-151-6007. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-149-6764: Bore Nominal Diameter: 2.248 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.187 INCHES FIRST END IN; Hub Nominal Diameter: 0.956 INCHES SECOND END IN; Backlash Designation: GRADE D. 21 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.