The Gear,helical, cataloged under National Stock Number 3020-00-989-5990, 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 24 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 | 3020-00-989-5990 |
| Primary Part Number | 16987-2 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — No Item Name Available |
| Manufacturer | Dar Electronics Inc Dba National Radio Co |
| Status | ACTIVE |
| Tooth Direction | LEFT |
| Material | STEEL COMP 303 OVERALL |
| Nominal Outside Diameter | 0.8375 INCHES IN |
| Tooth Form | STANDARD |
| Pressure Angle | 20.0000 DEGREES |
| Surface Treatment | PASSIVATE OVERALL |
| Pitch Diameter | 0.7950 INCHES NOMINAL IN |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Helix Angle | 45.0000 DEGREES |
| Bore Nominal Diameter | 0.1250 INCHES BOTH ENDS IN |
| Face Nominal Width | 0.125 INCHES IN |
| Hub Nominal Diameter | 0.313 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Teeth Type | SINGLE HELIX |
| Mounting Hole Nominal Thread Size | 0.086 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.219 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Attachment Method | MOUNTING HOLE |
| Body Style | PLAIN, SOLID |
| Teeth Quantity | 27 |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 16987-2 | Dar Electronics Inc Dba National Radio Co (USA) |
NSN 3020-00-989-5990 is a Gear,helical, manufactured by Dar Electronics Inc Dba National Radio Co, classified under FSC 3020 (No Item Name Available). Status: active.
NSN 3020-00-989-5990 has 1 cross-referenced part number: 16987-2 (Dar Electronics Inc Dba National Radio Co).
There is 1 known substitute for 3020-00-989-5990: 5999-00-079-6624. Verify interchangeability with system specifications before substitution.
Key specifications for 16987-2: Tooth Direction: LEFT; Material: STEEL COMP 303 OVERALL; Nominal Outside Diameter: 0.8375 INCHES IN; Tooth Form: STANDARD. 24 total characteristics are documented in the Federal Logistics Information System.