The Gear,worm Wheel, cataloged under National Stock Number 3020-00-709-2052, 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 19 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-709-2052 |
| Primary Part Number | Q11-9 |
| Item Name | Gear,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 | 0.250 INCHES BOTH ENDS IN |
| Helix Angle | 14.0333 DEGREES |
| Hub Nominal Diameter | 0.500 INCHES FIRST END IN |
| Teeth Quantity | 50 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.220 INCHES FIRST END IN |
| Throat Nominal Radius | 0.146 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | MIL-B-994 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.0407 INCHES MINIMUM AND 1.0417 INCHES MAXIMUM IN |
| Hub Style Designator | PINNED FIRST END |
| Nominal Outside Diameter | 1.125 INCHES IN |
| Pressure Angle | 25.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Mating Thread Lead Quantity | 4 |
| 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 |
|---|---|
| WGP5-21 | Secs Inc (USA) |
| 478D110H18 | Westinghouse Electric Corp (USA) |
| Q11-9 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| 331C120H03 | Westinghouse Electric Corp (USA) |
| 331C120H03 | Profile Gear Corp (USA) |
| Reference | Meaning |
|---|---|
| 478D110H18 | 5/2 Secondary reference U.S. Government activity |
| 331C120H03 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-709-2052 is a Gear,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 3020-00-709-2052 has 5 manufacturer part numbers on file: WGP5-21 (Secs Inc), 478D110H18 (Westinghouse Electric Corp), Q11-9 (Roller Bearing Co of America, Inc Div Pic Design), 331C120H03 (Westinghouse Electric Corp), 331C120H03 (Profile Gear Corp).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-106-4156, 3040-01-213-3562. Verify interchangeability with system specifications before substitution.
Key specifications for Q11-9: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Helix Angle: 14.0333 DEGREES; Hub Nominal Diameter: 0.500 INCHES FIRST END IN; Teeth Quantity: 50. 19 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.