The Gear,antibacklash,spur, cataloged under National Stock Number 3020-00-368-8237, 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 Southern Gear & Machine Inc. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-368-8237 |
| Primary Part Number | 7521071 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Southern Gear & Machine Inc |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 RETAINING RING AND 1 STOP PIN |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.183 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.312 INCHES SECOND END IN |
| Teeth Quantity | 72 |
| Clamping Surface Nominal Length | 0.172 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-STD-171,FINISH NO. 5.4.1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.203 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.050 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | SPLIT FIRST END |
| Hub Style Designator | 1 GROOVE SECOND END |
| Nominal Outside Diameter | 0.771 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nominal Distance From End to First Groove | 0.021 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| First Groove Nominal Diameter | 0.290 INCHES SECOND END IN |
| First Groove Nominal Width | 0.029 INCHES SECOND END IN |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.104 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 |
|---|---|
| 7521071 PRIMARY | Southern Gear & Machine Inc (USA) |
| 9703-1002S PRIMARY | Designatronics Inc Perfect Gear and Instrument Div (USA) |
| Reference | Meaning |
|---|---|
| 901004-4C | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 3020-00-368-8237 is a Gear,antibacklash,spur, manufactured by Southern Gear & Machine Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-368-8237 has 2 manufacturer part numbers on file: 7521071 (Southern Gear & Machine Inc), 9703-1002S (Designatronics Inc Perfect Gear and Instrument Div).
Key specifications for 7521071: Furnished Items and Quantity: 1 RETAINING RING AND 1 STOP PIN; Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.183 INCHES FIRST END IN; Hub Nominal Diameter: 0.312 INCHES SECOND END IN. 26 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.