The Gear,worm, cataloged under National Stock Number 3020-01-258-6952, 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 Designatronics Inc Div Stock Drive Products. Government technical data includes 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-258-6952 |
| Primary Part Number | 1Q55-N48 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Designatronics Inc Div Stock Drive Products |
| Status | ACTIVE |
| Thread Form Direction | RIGHT-HAND |
| Bore Nominal Diameter | 0.188 INCHES BOTH ENDS IN |
| Helix Angle | 3.5831 DEGREES |
| Hub Nominal Diameter | 0.260 INCHES FIRST END IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.188 INCHES FIRST END IN |
| Face Type | STRAIGHT |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 0.3330 INCHES NOMINAL IN |
| Hub Style Designator | PINNED FIRST END |
| Thread Form Quantity | 1 |
| Nominal Outside Diameter | 0.375 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.562 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 |
|---|---|
| 1Q55-N48 PRIMARY | Designatronics Inc Div Stock Drive Products (USA) |
| Reference | Meaning |
|---|---|
| C652 PIECE 15 | C/1 Advisory reference — outside the item-of-supply concept Dynalec Corporation |
| C652 PIECE 15 | 5/9 Secondary reference The Electric Tachometer Corp. |
| C652 | D/9 Drawing number reference only The Electric Tachometer Corp. |
NSN 3020-01-258-6952 is a Gear,worm, manufactured by Designatronics Inc Div Stock Drive Products, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-258-6952 has 1 manufacturer part number on file: 1Q55-N48 (Designatronics Inc Div Stock Drive Products).
1 possible match (shared part number, not a government interchangeability claim): 2520-01-301-9153. Verify interchangeability with system specifications before substitution.
Key specifications for 1Q55-N48: Thread Form Direction: RIGHT-HAND; Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Helix Angle: 3.5831 DEGREES; Hub Nominal Diameter: 0.260 INCHES FIRST END IN. 15 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.