The Gear,spur, cataloged under National Stock Number 3020-00-974-7599, 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 Mack Trucks Inc Parts Opn. Government technical data includes 18 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 | 3020-00-974-7599 |
| Primary Part Number | 681GB14 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Mack Trucks Inc Parts Opn |
| Status | ACTIVE |
| Keyway Nominal Width | 0.187 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.749 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.120 INCHES FIRST END IN |
| Teeth Quantity | 17 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.185 INCHES FIRST END IN |
| Hardness Rating | 75.0 ROCKWELL C MINIMUM AND 80.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.4167 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 1.576 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.469 INCHES BOTH ENDS IN |
| Pressure Angle | 24.5000 DEGREES |
| Material | STEEL COMP 1118 OVERALL |
| Face Nominal Width | 0.775 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 |
|---|---|
| 681GB14 PRIMARY | Mack Trucks Inc Parts Opn (USA) |
NSN 3020-00-974-7599 is a Gear,spur, manufactured by Mack Trucks Inc Parts Opn, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-974-7599 has 1 manufacturer part number on file: 681GB14 (Mack Trucks Inc Parts Opn).
Key specifications for 681GB14: Keyway Nominal Width: 0.187 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.749 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.120 INCHES FIRST END IN; Teeth Quantity: 17. 18 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.