The Gear,spur, cataloged under National Stock Number 3020-00-079-7122, 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 Instruments and Flight Research, Inc.. Government technical data includes 30 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-079-7122 |
| Primary Part Number | 526044-160 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Instruments and Flight Research, Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.188 INCHES BOTH ENDS IN |
| Backlash Designation | GRADE C |
| Teeth Quantity | 160 |
| Surface Treatment Document and Classification | MIL-A-8625 T2 FED SPEC 2ND TREATMENT RESPONSE TEETH |
| Surface Treatment Document and Classification | MIL-S-5002 FED SPEC 1ST TREATMENT RESPONSE HUB |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.265 INCHES FIRST END IN |
| First Step Nominal Length | 0.046 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 |
| Hardness Rating | 235.0 BRINELL STANDARD NOMINAL HUB |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-A-250/4 T3 FED SPEC SINGLE MATERIAL RESPONSE TEETH |
| Material Document and Classification | QQ-S-763,CL 416 FED SPEC SINGLE MATERIAL RESPONSE HUB |
| Pitch Diameter | 2.5000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.438 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Mounting Hole Nominal Thread Size | 0.138 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| End Nominal Length | 0.219 INCHES FIRST END IN |
| Nominal Outside Diameter | 2.531 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 32 TRANSVERSELY THROUGH HUB FIRST END |
| Surface Treatment | ANODIZE TEETH |
| Surface Treatment | PASSIVATE HUB |
| End Nominal Diameter | 0.375 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 TEETH |
| Material | STEEL COMP 416 HUB |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| 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 |
|---|---|
| 526044-160 PRIMARY | Instruments and Flight Research, Inc. (USA) |
| GH17-160XHP4 | Secs Inc (USA) |
| Reference | Meaning |
|---|---|
| P64A19X160 | 5/9 Secondary reference W. M. Berg, Inc. |
NSN 3020-00-079-7122 is a Gear,spur, manufactured by Instruments and Flight Research, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-079-7122 has 2 manufacturer part numbers on file: 526044-160 (Instruments and Flight Research, Inc.), GH17-160XHP4 (Secs Inc).
Key specifications for 526044-160: Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Backlash Designation: GRADE C; Teeth Quantity: 160; Surface Treatment Document and Classification: MIL-A-8625 T2 FED SPEC 2ND TREATMENT RESPONSE TEETH. 30 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.