The Gear,worm, cataloged under National Stock Number 3020-01-105-2887, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 3020-01-105-2887 |
| Primary Part Number | 1C5-N32 |
| 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 | 4.0833 DEGREES |
| Hub Nominal Diameter | 0.320 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 | 0.4380 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Thread Form Quantity | 1 |
| Nominal Outside Diameter | 0.500 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.320 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 |
NSN 3020-01-105-2887 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 3020-01-105-2887 has 2 manufacturer part numbers on file: 1C5-N32 (Designatronics Inc Div Stock Drive Products), 401124 (Pyser Sgi Limited).
1 possible match (shared part number, not a government interchangeability claim): 4130-01-497-7439. Verify interchangeability with system specifications before substitution.
Key specifications for 1C5-N32: Thread Form Direction: RIGHT-HAND; Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Helix Angle: 4.0833 DEGREES; Hub Nominal Diameter: 0.320 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.