The Gear,helical, cataloged under National Stock Number 3020-00-989-7905, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Dar Electronics Inc Dba National Radio Co. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-989-7905 |
| Primary Part Number | A18275 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — No Item Name Available |
| Manufacturer | Dar Electronics Inc Dba National Radio Co |
| Status | ACTIVE |
| Pitch Diameter | 1.1780 INCHES NOMINAL IN |
| Teeth Quantity | 40 |
| Body Style | PLAIN, SOLID |
| Helix Angle | 45.0000 DEGREES |
| Teeth Type | SINGLE HELIX |
| Pressure Angle | 20.0000 DEGREES |
| Tooth Direction | LEFT |
| Hub Nominal Diameter | 0.500 INCHES FIRST END IN |
| Tooth Form | STANDARD |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Material | STEEL COMP 303 OVERALL |
| Hub Style Designator | PLAIN FIRST END |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Outside Diameter | 1.2200 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Surface Treatment | PASSIVATE OVERALL |
| Bore Nominal Diameter | 0.2500 INCHES BOTH ENDS IN |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.125 INCHES IN |
| Mounting Hole Nominal Thread Size | 0.138 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| A18275 | Dar Electronics Inc Dba National Radio Co (USA) |
NSN 3020-00-989-7905 is a Gear,helical, manufactured by Dar Electronics Inc Dba National Radio Co, classified under FSC 3020 (No Item Name Available). Status: active.
NSN 3020-00-989-7905 has 1 cross-referenced part number: A18275 (Dar Electronics Inc Dba National Radio Co).
There is 1 known substitute for 3020-00-989-7905: 5985-00-812-4668. Verify interchangeability with system specifications before substitution.
Key specifications for A18275: Pitch Diameter: 1.1780 INCHES NOMINAL IN; Teeth Quantity: 40; Body Style: PLAIN, SOLID; Helix Angle: 45.0000 DEGREES. 23 total characteristics are documented in the Federal Logistics Information System.