The Gear,spur, cataloged under National Stock Number 3020-00-561-6989, 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 Incorporated Div Sterling Instruments Div. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Gear,spur |
| FSC / FSG | 3020 — Gears, Pulleys, Sprockets, and Transmission Chain (FSG 30) |
| Manufacturers | Designatronics Incorporated Div Sterling Instruments Div (CAGE 00328); Designatronics Inc Perfect Gear and Instrument Div (CAGE 12444); Roller Bearing Co of America, Inc Div Pic Design (CAGE 00141); Secs Inc (CAGE 23266) |
| Parameter | Value |
|---|---|
| NSN | 3020-00-561-6989 |
| Primary Part Number | S21-36 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Designatronics Incorporated Div Sterling Instruments Div |
| Status | ACTIVE |
| 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 |
|---|---|
| S21-36 PRIMARY | Designatronics Incorporated Div Sterling Instruments Div (USA) |
| U3S36 PRIMARY | Designatronics Inc Perfect Gear and Instrument Div (USA) |
| J1-36 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| GH12-36 PRIMARY | Secs Inc (USA) |
| Reference | Meaning |
|---|---|
| DJ1T36 | 5/9 Secondary reference Allied Devices Corp Dba Absolute Precision Co |
| F48S3-36 | 5/9 Secondary reference W. M. Berg, Inc. |
NSN 3020-00-561-6989 is a Gear,spur, manufactured by Designatronics Incorporated Div Sterling Instruments Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-561-6989 has 4 manufacturer part numbers on file: S21-36 (Designatronics Incorporated Div Sterling Instruments Div), U3S36 (Designatronics Inc Perfect Gear and Instrument Div), J1-36 (Roller Bearing Co of America, Inc Div Pic Design), GH12-36 (Secs Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-032-5804, 5340-01-722-5476. Verify interchangeability with system specifications before substitution.
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.