The Gear Cluster,bevel-Helical, cataloged under National Stock Number 3020-00-434-8341, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-434-8341 |
| Item Name | Gear Cluster,bevel-Helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,MIL-S-5000 COMP 4340 COND C4 OR MIL-S-5626 COMP 4140 COND C4BLACK OXIDE COATED PER BPS FW4084 BELL HELICOPTER CO,ROCKWELL HARDNESSRATING C SCALE 32 TO 38,TWO GEARS W/INTERNAL HUB,DIM.,3.427 IN. MIN,3.447IN. MAX O/A LG,0.718 IN. NOM HUB OUTSIDE DIA,0.5620 IN. NOM ID BEVEL GEAREND BY 2.438 IN. LG,BEVEL GEAR DATA,1.8510 IN. MIN,1.8530 IN. MAX OD,1.6000IN. NOM PITCH DIA,0.187 IN. NOM FACE WIDTH,20 DEG PRESSURE ANGLE,LEFT HANDDRIVE,15 TEETH,0.33510 IN. CIRCULAR PITCH,HELICAL FEAR DATA,0.7210 IN. MIN0.7230 IN. MAX OD,0.6618 IN. NOM PITCH DIA,0.250 IN. NOM FACE WIDTH,14.5 DEGPRESSURE ANGLE,19 DEG 11 MIN HELIX ANGLE,RIGHT HAND HELIX,20 TEETH,0.09818IN. CIRCULAR PITCH,HUB OD THREADED W/0.781-32 NS CLASS 3 THREADS 0.200 IN.LG,0.737 IN. FROM SHAFT END,0.312 IN. ID BY 0.937 IN. LG IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 47-620-246-1 | 3/2 Design control — primary reference U.S. Government activity |
| 47-620-246-1 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-434-8341 is a Gear Cluster,bevel-Helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-434-8341: General Characteristics Item Description: STEEL,MIL-S-5000 COMP 4340 COND C4 OR MIL-S-5626 COMP 4140 COND C4BLACK OXIDE COATED PER BPS FW4084 BELL HELICOPTER CO,ROCKWELL HARDNESSRATING C SCALE 32 TO 38,TWO GEARS W/INTERNAL HUB,DIM.,3.427 IN. MIN,3.447IN. MAX O/A LG,0.718 IN. NOM HUB OUTSIDE DIA,0.5620 IN. NOM ID BEVEL GEAREND BY 2.438 IN. LG,BEVEL GEAR DATA,1.8510 IN. MIN,1.8530 IN. MAX OD,1.6000IN. NOM PITCH DIA,0.187 IN. NOM FACE WIDTH,20 DEG PRESSURE ANGLE,LEFT HANDDRIVE,15 TEETH,0.33510 IN. CIRCULAR PITCH,HELICAL FEAR DATA,0.7210 IN. MIN0.7230 IN. MAX OD,0.6618 IN. NOM PITCH DIA,0.250 IN. NOM FACE WIDTH,14.5 DEGPRESSURE ANGLE,19 DEG 11 MIN HELIX ANGLE,RIGHT HAND HELIX,20 TEETH,0.09818IN. CIRCULAR PITCH,HUB OD THREADED W/0.781-32 NS CLASS 3 THREADS 0.200 IN.LG,0.737 IN. FROM SHAFT END,0.312 IN. ID BY 0.937 IN. LG IN. 1 specification is 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.
NSN 3020-00-434-8341 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.