The Gear,worm, cataloged under National Stock Number 3020-00-474-5148, 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 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-474-5148 |
| Primary Part Number | Q8-1 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Thread Form Direction | RIGHT-HAND |
| Bore Nominal Diameter | 0.125 INCHES COUNTER BORE SECOND END IN |
| Helix Angle | 3.5833 DEGREES |
| Hub Nominal Diameter | 0.312 INCHES FIRST END IN |
| Bore Style | W/COUNTERBORE SECOND END |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.188 INCHES FIRST END IN |
| Face Type | STRAIGHT |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 0.3333 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Thread Form Quantity | 1 |
| Mounting Hole Nominal Thread Size | 0.086 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Nominal Outside Diameter | 0.375 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.562 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 |
|---|---|
| Q8-1 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| Reference | Meaning |
|---|---|
| DQ8A1 | 5/9 Secondary reference Allied Devices Corp Dba Absolute Precision Co |
| 10229155 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
| QB1 | 5/9 Secondary reference Profile Gear Corp |
| 2359461-1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 3020-00-474-5148 is a Gear,worm, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-474-5148 has 1 manufacturer part number on file: Q8-1 (Roller Bearing Co of America, Inc Div Pic Design).
4 possible matches (shared part number, not a government interchangeability claim): 6615-00-515-4894, 5905-01-127-7514, 6130-01-339-7384. Verify interchangeability with system specifications before substitution.
Key specifications for Q8-1: Thread Form Direction: RIGHT-HAND; Bore Nominal Diameter: 0.125 INCHES COUNTER BORE SECOND END IN; Helix Angle: 3.5833 DEGREES; Hub Nominal Diameter: 0.312 INCHES FIRST END IN. 20 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.