The Sprocket Wheel, cataloged under National Stock Number 3020-00-425-0442, 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 Astec Industries Inc Div Astec Ind.. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-425-0442 |
| Primary Part Number | B19-689 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Astec Industries Inc Div Astec Ind. |
| Status | ACTIVE |
| Securing Method | THREADED HOLE(S) |
| Bore Length | 2.000 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Teeth Hardness Rating | 7.000 ROCKWELL C MINIMUM AND 60.000 ROCKWELL C MAXIMUM |
| Tooth Pitch | 1.000 INCHES NOMINAL IN |
| Asa Standard Chain Number | 80 |
| Outside Diameter | 4.657 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Metallic Hardness Rating and Location | 57.000 ROCKWELL C MINIMUM BODY AND 60.000 ROCKWELL C MAXIMUM BODY |
| Pitch Diameter | 4.179 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 13 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | ROCKWELL |
| Distance From Center of Bore to Bottom of Keyway | 1.032 INCHES MINIMUM AND 1.033 INCHES MAXIMUM IN |
| Distance From Hub End to Flange End | 1.344 INCHES MINIMUM AND 3.125 INCHES MAXIMUM AA END IN |
| Securing Hole Quantity | 2 |
| Thread Size | 1/2-13 |
| Keyway Width | 0.623 INCHES NOMINAL IN |
| Hole Location | 1 HOLE LOCATED ON TOP OF KEYWAY 1 HOLE LOCATED 90 DEG CW FROM KEYWAY |
| Bore Diameter | 1.688 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN |
| Material | STEEL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.563 INCHES NOMINAL IN |
| Furnished Items and Quantity | 2 SETSCREWS |
| Securing Location | AA END OR BB 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 |
|---|---|
| B19-689 PRIMARY | Astec Industries Inc Div Astec Ind. (USA) |
| Reference | Meaning |
|---|---|
| B19-689 | 5/9 Secondary reference Barber-Greene Co |
| B19-689 | C/1 Advisory reference — outside the item-of-supply concept Minnpar, Llc Dba Minnpar |
NSN 3020-00-425-0442 is a Sprocket Wheel, manufactured by Astec Industries Inc Div Astec Ind., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-425-0442 has 1 manufacturer part number on file: B19-689 (Astec Industries Inc Div Astec Ind.).
Key specifications for B19-689: Securing Method: THREADED HOLE(S); Bore Length: 2.000 INCHES NOMINAL IN; Design Form: PLAIN; Teeth Hardness Rating: 7.000 ROCKWELL C MINIMUM AND 60.000 ROCKWELL C MAXIMUM. 29 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.