The Gear,worm, cataloged under National Stock Number 3020-00-554-8540, 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 Westinghouse Electric Corp. Government technical data includes 26 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-554-8540 |
| Primary Part Number | 2JB1004 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Thread Form Direction | RIGHT-HAND |
| Bore Nominal Diameter | 0.375 INCHES BOTH ENDS IN |
| Helix Angle | 3.6123 DEGREES |
| Hub Nominal Diameter | 0.812 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.000 INCHES FIRST END IN |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.719 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.3440 INCHES SECOND END IN |
| Face Type | STRAIGHT |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-20166 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.9650 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Hub Style Designator | 1 GROOVE FIRST END |
| Thread Form Quantity | 1 |
| Mounting Hole Nominal Thread Size | 0.250 INCHES TRANSVERSELY THROUGH HUB SECOND END IN |
| Nominal Outside Diameter | 1.0900 INCHES IN |
| Nominal Distance From End to First Groove | 0.500 INCHES FIRST END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 1022 OR STEEL COMP 8620 OVERALL |
| First Groove Nominal Diameter | 0.812 INCHES FIRST END IN |
| First Groove Nominal Width | 0.219 INCHES FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB SECOND END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.750 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 |
|---|---|
| 2JB1004 | Westinghouse Electric Corp (USA) |
| B3263769 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2-JB-1004 | 3/2 Design control — primary reference U.S. Government activity |
| 2-JB-1004 | 5/9 Secondary reference U.S. Government activity |
| 2JB1004P1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 3020-00-554-8540 is a Gear,worm, manufactured by Westinghouse Electric Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-554-8540 has 2 manufacturer part numbers on file: 2JB1004 (Westinghouse Electric Corp), B3263769 (Naval Sea Systems Command).
Key specifications for 2JB1004: Thread Form Direction: RIGHT-HAND; Bore Nominal Diameter: 0.375 INCHES BOTH ENDS IN; Helix Angle: 3.6123 DEGREES; Hub Nominal Diameter: 0.812 INCHES SECOND END IN. 26 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.