The Gear,spur, cataloged under National Stock Number 3020-00-042-3899, 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 Lockheed Martin Librascope Corporation. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-042-3899 |
| Primary Part Number | BUWEPSDWG1786934 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| Teeth Quantity | 35 |
| Surface Treatment Document and Classification | MIL-STD171 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Nominal Distance Between Body Face and Protruding Hub End | 0.726 INCHES FIRST END IN |
| First Step Nominal Length | 0.030 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | AISI 416 ASSN STD 1ST MATERIAL RESPONSE OR QQ-S-763 CLASS 416 COND A FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.3646 INCHES NOMINAL IN |
| First Step Nominal Diameter | 0.300 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| End Nominal Length | 0.726 INCHES FIRST END IN |
| Nominal Outside Diameter | 0.384 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| End Nominal Diameter | 0.187 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 416 OVERALL |
| Face Nominal Width | 0.094 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 |
|---|---|
| L310033491 | Lockheed Martin Librascope Corporation (USA) |
| BUWEPSDWG1786934 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| 1786934 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-042-3899 is a Gear,spur, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-042-3899 has 3 manufacturer part numbers on file: L310033491 (Lockheed Martin Librascope Corporation), BUWEPSDWG1786934 (Lockheed Martin Librascope Corporation), 1786934 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for BUWEPSDWG1786934: Teeth Quantity: 35; Surface Treatment Document and Classification: MIL-STD171 MIL STD SINGLE TREATMENT RESPONSE OVERALL; Body Style: PLAIN, SOLID; Nominal Distance Between Body Face and Protruding Hub End: 0.726 INCHES FIRST END IN. 17 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.