The Gear,spur, cataloged under National Stock Number 3020-01-665-3155, 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 Martin Sprocket and Gear Co Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-665-3155 |
| Primary Part Number | S1644SS X 1/2 KW |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Martin Sprocket and Gear Co Inc |
| Status | ACTIVE |
| Teeth Quantity | 44 |
| Body Style | PLAIN, SOLID |
| Nominal Distance Between Body Face and Protruding Hub End | 0.500 INCHES BETWEEN BODY AND FLANGE IN |
| Nominal Overall Length | 1.000 INCHES IN |
| Style Designator | SOLID BACK RING, PROTRUDING HUB |
| Pitch Diameter | 2.750 INCHES NOMINAL IN |
| Nominal Outside Diameter | 2.875 INCHES IN |
| Pressure Angle | 15.5 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.500 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 |
|---|---|
| S1644SS X 1/2 KW | Martin Sprocket and Gear Co Inc (USA) |
| Reference | Meaning |
|---|---|
| S1644SS X 1/2 KW | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-665-3155 is a Gear,spur, manufactured by Martin Sprocket and Gear Co Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-665-3155 has 1 manufacturer part number on file: S1644SS X 1/2 KW (Martin Sprocket and Gear Co Inc).
Key specifications for S1644SS X 1/2 KW: Teeth Quantity: 44; Body Style: PLAIN, SOLID; Nominal Distance Between Body Face and Protruding Hub End: 0.500 INCHES BETWEEN BODY AND FLANGE IN; Nominal Overall Length: 1.000 INCHES IN. 10 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.