The Gear,spur, cataloged under National Stock Number 3020-00-989-4934, 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 Acco-Babcock Inc Hoist and Crane Div. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-989-4934 |
| Primary Part Number | 820821 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Acco-Babcock Inc Hoist and Crane Div |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.000 INCHES BOTH ENDS IN |
| Teeth Quantity | 16 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 2.125 INCHES BOTH ENDS IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Hardness Rating | 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 1141 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.6660 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Nominal Outside Diameter | 3.010 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 1141 OVERALL |
| Counterbore Nominal Depth | 0.377 INCHES BOTH ENDS IN |
| Face Nominal Width | 1.875 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 |
|---|---|
| 820821 PRIMARY | Acco-Babcock Inc Hoist and Crane Div (USA) |
NSN 3020-00-989-4934 is a Gear,spur, manufactured by Acco-Babcock Inc Hoist and Crane Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-989-4934 has 1 manufacturer part number on file: 820821 (Acco-Babcock Inc Hoist and Crane Div).
Key specifications for 820821: Bore Nominal Diameter: 2.000 INCHES BOTH ENDS IN; Teeth Quantity: 16; Body Style: PLAIN, SOLID; Counterbore Nominal Diameter: 2.125 INCHES BOTH ENDS 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.