The Gear,helical, cataloged under National Stock Number 3020-00-251-0895, 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 Schwitzer Engine Components a Household Intl Co. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-251-0895 |
| Primary Part Number | B113839 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Schwitzer Engine Components a Household Intl Co |
| Status | ACTIVE |
| Keyway Nominal Width | 0.252 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.375 INCHES BOTH ENDS IN |
| Helix Angle | 33.1172 DEGREES |
| Teeth Quantity | 24 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 4140 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.8654 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 3.064 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.816 INCHES BOTH ENDS IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 4140 OVERALL |
| Face Nominal Width | 1.250 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 |
|---|---|
| B113839 PRIMARY | Schwitzer Engine Components a Household Intl Co (USA) |
| 82401DSPC3 PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| 82403B PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 82403B | 5/9 Secondary reference Hercules Engine Co Inc |
| 82401DSPC3 | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 3020-00-251-0895 is a Gear,helical, manufactured by Schwitzer Engine Components a Household Intl Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-251-0895 has 3 manufacturer part numbers on file: B113839 (Schwitzer Engine Components a Household Intl Co), 82401DSPC3 (Brinkley Technology Group Llc Dba Hercules Manufacturing), 82403B (Brinkley Technology Group Llc Dba Hercules Manufacturing).
Key specifications for B113839: Keyway Nominal Width: 0.252 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.375 INCHES BOTH ENDS IN; Helix Angle: 33.1172 DEGREES; Teeth Quantity: 24. 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.