The Sprocket Wheel, cataloged under National Stock Number 3020-00-255-9950, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-255-9950 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Outside Diameter | 2.500 INCHES NOMINAL BOTH ENDS IN |
| Bore Length | 2.375 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Teeth Hardness Rating | 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Tooth Pitch | 0.625 INCHES NOMINAL IN |
| Asa Standard Chain Number | 50-3 |
| Outside Diameter | 3.720 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Metallic Hardness Rating and Location | 50.0 ROCKWELL C MINIMUM HUB AND 55.0 ROCKWELL C MAXIMUM HUB |
| Material Document and Classification | SAE 1040 ASSN STD 1ST MATERIAL RESPONSE AND SAE 1045 ASSN STD 2ND MATERIAL RESPONSE |
| Pitch Diameter | 3.401 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 3 |
| Teeth Quantity Per Row | 17 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | ROCKWELL |
| Distance From Center of Bore to Bottom of Keyway | 0.737 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 0.3145 INCHES NOMINAL BOTH ENDS IN |
| Center to Center Distance Between Teeth Rows | 0.707 INCHES NOMINAL IN |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Bore Diameter | 1.1498 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Material | STEEL COMP 1040 OR STEEL COMP 1045 |
| Furnished Items | KEYING FACILITY |
| Face Width | 1.740 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 240-404 | 3/9 Design control — primary reference American Laundry Machinery Inc |
NSN 3020-00-255-9950 is a Sprocket Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-088-1816, 3120-01-187-1941. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-255-9950: Hub Outside Diameter: 2.500 INCHES NOMINAL BOTH ENDS IN; Bore Length: 2.375 INCHES NOMINAL IN; Design Form: PLAIN; Teeth Hardness Rating: 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM. 26 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.