The Gear,antibacklash,spur, cataloged under National Stock Number 3020-00-604-8238, 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 Us Army Aviation and Missile Command. Government technical data includes 22 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-604-8238 |
| Primary Part Number | 9176940 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.500 INCHES FIRST END IN |
| Teeth Quantity | 120 |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY |
| Surface Treatment Document and Classification | MIL-STD-171,5.4 MIL STD SINGLE TREATMENT RESPONSE HUB |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.224 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.281 INCHES FIRST END IN |
| Nominal Overall Length | 0.609 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-A-267,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Pitch Diameter | 1.6666 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | THREADED SECOND END |
| Hub Style Designator | PINNED FIRST END |
| Nominal Outside Diameter | 1.694 INCHES IN |
| Surface Treatment | PASSIVATE HUB |
| Surface Treatment | ANODIZE BODY |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 BODY |
| Material | STEEL CORROSION RESISTING HUB |
| 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 |
NSN 3020-00-604-8238 is a Gear,antibacklash,spur, manufactured by Us Army Aviation and Missile Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-604-8238 has 2 manufacturer part numbers on file: 9176940 (Us Army Aviation and Missile Command), P4-5-120S (Roller Bearing Co of America, Inc Div Pic Design).
Key specifications for 9176940: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.500 INCHES FIRST END IN; Teeth Quantity: 120; Surface Treatment Document and Classification: MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY. 22 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.