The Sprocket Wheel, cataloged under National Stock Number 3020-01-438-8231, 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 Union Chain Div of Ust Inc. Government technical data includes 24 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-438-8231 |
| Primary Part Number | 35B17-1/2 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Union Chain Div of Ust Inc |
| Status | ACTIVE |
| Hub Outside Diameter | 1.6300 INCHES NOMINAL BB END IN |
| Securing Method | SETSCREW |
| Bore Length | 0.7500 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.3750 INCHES NOMINAL IN |
| Asa Standard Chain Number | 35-1 |
| Outside Diameter | 2.2310 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Pitch Diameter | 2.0410 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 17 |
| Protruding Hub Characteristic | PLAIN |
| Distance From Center of Bore to Bottom of Keyway | 0.4380 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 0.5820 INCHES NOMINAL BB END IN |
| Keyway Width | 0.1250 INCHES NOMINAL IN |
| Bore Diameter | 0.5000 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.1680 INCHES NOMINAL IN |
| Furnished Items and Quantity | SETSCREW 1 |
| Securing Location | 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 |
|---|---|
| 35B17-1/2 PRIMARY | Union Chain Div of Ust Inc (USA) |
| 35B17 PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| 35B17-1/2 | Altra Industrial Motion Corp. (USA) |
| 35B17-1/2 PRIMARY | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| 35B17-1/2 | Werth Cleaners and Laundry Inc (USA) |
| Reference | Meaning |
|---|---|
| H554CL001 FIND NUMBER 28 | 5/2 Secondary reference U.S. Government activity |
| H554CL001 | D/9 Drawing number reference only U.S. Government activity |
| 35B17-1/2 | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
| 35B17-1/2 | 3/9 Design control — primary reference Emerson Electric Co Browning Mfg Div |
| H554CJ001 | D/9 Drawing number reference only U.S. Government activity |
| 116579 | 5/2 Secondary reference U.S. Government activity |
| H554CJ001 FIND NUMBER 23 | 5/2 Secondary reference U.S. Government activity |
| ANSI B29.1 35B17-1/2 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-438-8231 is a Sprocket Wheel, manufactured by Union Chain Div of Ust Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-438-8231 has 5 manufacturer part numbers on file: 35B17-1/2 (Union Chain Div of Ust Inc), 35B17 (Emerson Electric Co Browning Mfg Div), 35B17-1/2 (Altra Industrial Motion Corp.), 35B17-1/2 (Diamond Chain Co Div of Amsted Industries Inc), 35B17-1/2 (Werth Cleaners and Laundry Inc).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-438-8716. Verify interchangeability with system specifications before substitution.
Key specifications for 35B17-1/2: Hub Outside Diameter: 1.6300 INCHES NOMINAL BB END IN; Securing Method: SETSCREW; Bore Length: 0.7500 INCHES NOMINAL IN; Design Form: PLAIN. 24 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.