The Gear,spur, cataloged under National Stock Number 3020-00-455-2928, 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 Precision Gear Industries Llc. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-455-2928 |
| Primary Part Number | S6137-23076-1 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Precision Gear Industries Llc |
| Status | ACTIVE |
| Bore Nominal Diameter | 4.000 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 4.6205 INCHES FIRST END IN |
| Teeth Quantity | 82 |
| Surface Treatment Document and Classification | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 8 PLAIN AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.016 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.265 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | AMS-5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 6.8333 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | 1 GROOVE FIRST END |
| Nominal Outside Diameter | 7.000 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Nominal Distance From End to First Groove | 0.2400 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| First Groove Nominal Diameter | 4.4010 INCHES FIRST END IN |
| First Groove Nominal Width | 0.1725 INCHES FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.312 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| S6137-23076-1 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| S6137-23076-1 PRIMARY | Precision Gear Industries Llc (USA) |
| S6137-23076-1 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| S6137-23076-1 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-455-2928 is a Gear,spur, manufactured by Precision Gear Industries Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-455-2928 has 3 manufacturer part numbers on file: S6137-23076-1 (Leonardo Spa Helicopters Division - Production Site), S6137-23076-1 (Precision Gear Industries Llc), S6137-23076-1 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6137-23076-1: Bore Nominal Diameter: 4.000 INCHES BOTH ENDS IN; Hub Nominal Diameter: 4.6205 INCHES FIRST END IN; Teeth Quantity: 82; Surface Treatment Document and Classification: MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 23 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.
NSN 3020-00-455-2928 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.