The Gear,spur, cataloged under National Stock Number 3020-01-435-9074, 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 Lake Shore Systems, Inc.. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-435-9074 |
| Primary Part Number | 2B1-592 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.313 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.251 INCHES BOTH ENDS IN |
| Teeth Quantity | 20 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED AXIALLY THROUGH BODY FIRST END |
| Precision Classification | ACCURACY GRADE 7 |
| Style Designator | HUBLESS |
| Material Document and Classification | QQ-S-633-C1040 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.0000 INCHES NOMINAL IN |
| Mounting Hole Nominal Thread Size | 0.250 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Outside Diameter | 5.397 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.274 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 1040 OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.312 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 |
|---|---|
| 2B1-592 PRIMARY | Lake Shore Systems, Inc. (USA) |
| 2D3-05842 ITEM NO 67 | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2D3-05842 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 3020-01-435-9074 is a Gear,spur, manufactured by Lake Shore Systems, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-435-9074 has 2 manufacturer part numbers on file: 2B1-592 (Lake Shore Systems, Inc.), 2D3-05842 ITEM NO 67 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-435-9076. Verify interchangeability with system specifications before substitution.
Key specifications for 2B1-592: Keyway Nominal Width: 0.313 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.251 INCHES BOTH ENDS IN; Teeth Quantity: 20; Body Style: PLAIN, SOLID. 18 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.