The Gear,spur, cataloged under National Stock Number 3020-01-425-9560, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-425-9560 |
| Primary Part Number | H57-21Q14 |
| Item Name | Gear,spur |
| 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 | 0.187 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.248 INCHES SECOND END IN |
| Teeth Quantity | 21 |
| Clamping Surface Nominal Length | 0.250 INCHES SECOND END IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.281 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 14 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.4375 INCHES NOMINAL IN |
| Hub Style Designator | SPLIT SECOND END |
| Nominal Outside Diameter | 0.478 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Attachment Method | SLOT |
| Face Nominal Width | 0.125 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 |
|---|---|
| S1164Z-P21-21T | Designatronics Incorporated Div Sterling Instruments Div (USA) |
| 12373390 | Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service (USA) |
| H57-21Q14 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| Reference | Meaning |
|---|---|
| 12373390 | 5/9 Secondary reference General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| 12373390 | 5/9 Secondary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 3020-01-425-9560 is a Gear,spur, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-425-9560 has 3 manufacturer part numbers on file: S1164Z-P21-21T (Designatronics Incorporated Div Sterling Instruments Div), 12373390 (Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service), H57-21Q14 (Roller Bearing Co of America, Inc Div Pic Design).
Key specifications for H57-21Q14: Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.248 INCHES SECOND END IN; Teeth Quantity: 21; Clamping Surface Nominal Length: 0.250 INCHES SECOND END IN. 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.