The Sprocket Wheel, cataloged under National Stock Number 3020-01-018-5997, 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 Diamond Chain Co Div of Amsted Industries Inc. Government technical data includes 25 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-018-5997 |
| Primary Part Number | 40B18F 1-3/8BORE |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Diamond Chain Co Div of Amsted Industries Inc |
| Status | ACTIVE |
| Hub Outside Diameter | 2.375 INCHES NOMINAL AA END IN |
| Securing Method | SETSCREW |
| Bore Length | 0.875 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.500 INCHES NOMINAL IN |
| Asa Standard Chain Number | 40 |
| Outside Diameter | 3.140 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Pitch Diameter | 2.879 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 18 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Center of Bore to Bottom of Keyway | 1.094 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 0.591 INCHES NOMINAL AA END IN |
| Keyway Width | 0.312 INCHES NOMINAL IN |
| Bore Diameter | 1.375 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.284 INCHES NOMINAL IN |
| Furnished Items and Quantity | SETSCREW,TWO EACH |
| 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 |
|---|---|
| 40B18F 1-3/8BORE PRIMARY | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| 40BS18X 1 3/8 | Martin Sprocket and Gear Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 1177PC32 | 5/9 Secondary reference Kings Point Machinery Inc Dba Kpm |
| 4018 1-3/8BORE | 3/9 Design control — primary reference Emerson Electric Co Browning Mfg Div |
| 40B18 | 5/9 Secondary reference Kings Point Machinery Inc Dba Kpm |
NSN 3020-01-018-5997 is a Sprocket Wheel, manufactured by Diamond Chain Co Div of Amsted Industries Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-018-5997 has 2 manufacturer part numbers on file: 40B18F 1-3/8BORE (Diamond Chain Co Div of Amsted Industries Inc), 40BS18X 1 3/8 (Martin Sprocket and Gear Co Inc).
Key specifications for 40B18F 1-3/8BORE: Hub Outside Diameter: 2.375 INCHES NOMINAL AA END IN; Securing Method: SETSCREW; Bore Length: 0.875 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.