The Sprocket Wheel, cataloged under National Stock Number 3020-00-937-9908, 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 25 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-937-9908 |
| Primary Part Number | EM5-21 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Hub Outside Diameter | 0.500 INCHES NOMINAL BOTH ENDS IN |
| Securing Method | THREADED HOLE(S) |
| Bore Length | 0.375 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.148 INCHES NOMINAL IN |
| Outside Diameter | 1.042 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-S-764, TYPE 303, COND A-CANCELED FED SPEC SINGLE MATERIAL RESPONSE |
| Pitch Diameter | 0.990 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 21 |
| Taper Bore Major Diameter | 0.2498 INCHES MINIMUM AND 0.2503 INCHES MAXIMUM IN |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Securing Hole Quantity | 1 |
| Thread Size | 6-32 |
| Surface Treatment | PASSIVATE |
| Hole Location | ONE LOCATED ON HUB BETWEEN HUB END AND FACE |
| Bore Diameter | 0.250 INCHES NOMINAL IN |
| Material | STEEL COMP 303 |
| Face Width | 0.125 INCHES NOMINAL IN |
| Furnished Items and Quantity | SETSCREW,ONE |
| Securing Location | AA END |
| 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 |
|---|---|
| EM5-21 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
NSN 3020-00-937-9908 is a Sprocket 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 3020-00-937-9908 has 1 manufacturer part number on file: EM5-21 (Roller Bearing Co of America, Inc Div Pic Design).
Key specifications for EM5-21: Hub Outside Diameter: 0.500 INCHES NOMINAL BOTH ENDS IN; Securing Method: THREADED HOLE(S); Bore Length: 0.375 INCHES NOMINAL IN; Design Form: PLAIN. 25 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.