The Gear,worm, cataloged under National Stock Number 3020-01-034-7181, 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 Grimes Aerospace Company. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 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 | 3020-01-034-7181 |
| Primary Part Number | 10305-1 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Helix Angle | 4.7665 DEGREES |
| Hub Nominal Diameter | 0.383 INCHES BOTH ENDS IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES BOTH ENDS IN |
| Face Type | CONCAVE |
| Mating Pitch Diameter | 0.6030 INCHES MINIMUM AND 0.6060 INCHES MAXIMUM IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 0.4970 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Features Provided | CASEHARDENED |
| Hub Style Designator | PINNED BOTH ENDS |
| Thread Form Quantity | 1 |
| Nominal Outside Diameter | 0.579 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 2315 OVERALL |
| Face Nominal Width | 0.383 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 |
|---|---|
| 10305-1 PRIMARY | Grimes Aerospace Company (USA) |
NSN 3020-01-034-7181 is a Gear,worm, manufactured by Grimes Aerospace Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-034-7181 has 1 manufacturer part number on file: 10305-1 (Grimes Aerospace Company).
3 possible matches (shared part number, not a government interchangeability claim): 5360-01-216-1703, 3120-01-384-2542, 5995-01-677-0578. Verify interchangeability with system specifications before substitution.
Key specifications for 10305-1: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Helix Angle: 4.7665 DEGREES; Hub Nominal Diameter: 0.383 INCHES BOTH ENDS IN; Bore Style: PLAIN BOTH ENDS. 16 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.