The Gear,antibacklash,spur, cataloged under National Stock Number 3020-01-433-8311, 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. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-433-8311 |
| Primary Part Number | S9712AR0078 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Designatronics Incorporated Div Sterling Instruments Div |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.120 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.186 INCHES BOTH ENDS IN |
| Teeth Quantity | 108 |
| Clamping Surface Nominal Length | 0.172 INCHES SECOND END IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.225 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.062 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 1.1250 INCHES NOMINAL IN |
| Hub Style Designator | SPLIT SECOND END |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 1.144 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.108 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 |
|---|---|
| S9712AR0078 PRIMARY | Designatronics Incorporated Div Sterling Instruments Div (USA) |
| 7511083 PRIMARY | Southern Gear & Machine Inc (USA) |
| Reference | Meaning |
|---|---|
| 901055-6C | 5/2 Secondary reference U.S. Government activity |
| 901055 | 7/1 Vendor item drawing reference U.S. Government activity |
NSN 3020-01-433-8311 is a Gear,antibacklash,spur, manufactured by Designatronics Incorporated Div Sterling Instruments Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-433-8311 has 2 manufacturer part numbers on file: S9712AR0078 (Designatronics Incorporated Div Sterling Instruments Div), 7511083 (Southern Gear & Machine Inc).
Key specifications for S9712AR0078: Bore Nominal Diameter: 0.120 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.186 INCHES BOTH ENDS IN; Teeth Quantity: 108; Clamping Surface Nominal Length: 0.172 INCHES SECOND 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.