The Gear,antibacklash,worm Wheel, cataloged under National Stock Number 3020-01-025-0489, 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 Roller Bearing Co of America, Inc Div Pic Design. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-025-0489 |
| Primary Part Number | Q13-35SPECIAL |
| Item Name | Gear,antibacklash,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.188 INCHES BOTH ENDS IN |
| Helix Angle | 3.5625 DEGREES |
| Hub Nominal Diameter | 0.250 INCHES FIRST END IN |
| Teeth Quantity | 93 |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.219 INCHES FIRST END IN |
| Face Type | CONCAVE |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-B-637 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB |
| Pitch Diameter | 1.4526 INCHES NOMINAL IN |
| Hub Style Designator | SPLIT FIRST END |
| Nominal Outside Diameter | 1.484 INCHES IN |
| Surface Treatment | PASSIVATE HUB |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL COMP 303 HUB |
| Material | COPPER ALLOY 464 BODY |
| Mating Thread Lead Quantity | 2 |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.188 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 |
|---|---|
| Q13-35SPECIAL PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| Reference | Meaning |
|---|---|
| 4256A404PC3 | D/9 Drawing number reference only L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
| 4256A424 | 7/2 Vendor item drawing reference L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
NSN 3020-01-025-0489 is a Gear,antibacklash,worm Wheel, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-025-0489 has 1 manufacturer part number on file: Q13-35SPECIAL (Roller Bearing Co of America, Inc Div Pic Design).
Key specifications for Q13-35SPECIAL: Bore Nominal Diameter: 0.188 INCHES BOTH ENDS IN; Helix Angle: 3.5625 DEGREES; Hub Nominal Diameter: 0.250 INCHES FIRST END IN; Teeth Quantity: 93. 21 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.