The Gear,worm, cataloged under National Stock Number 3020-00-035-2155, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-035-2155 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Thread Form Direction | LEFT-HAND |
| Bore Nominal Diameter | 0.520 INCHES SECOND END IN |
| Bore Nominal Diameter | 0.446 INCHES FIRST END IN |
| Helix Angle | 4.7667 DEGREES |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Face Type | STRAIGHT |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.9980 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Spline Quantity | 15 BOTH ENDS |
| Thread Form Quantity | 1 |
| Nominal Outside Diameter | 1.170 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 8740 OVERALL |
| Spline Pitch Diameter | 0.5000 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.870 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 |
|---|---|
| 338193L | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-035-2155 is a Gear,worm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-035-2155: Thread Form Direction: LEFT-HAND; Bore Nominal Diameter: 0.520 INCHES SECOND END IN; Bore Nominal Diameter: 0.446 INCHES FIRST END IN; Helix Angle: 4.7667 DEGREES. 17 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.