The Pulley,groove, cataloged under National Stock Number 3020-00-256-4189, 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 Sterling Engine Co Inc. Government technical data includes 28 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-256-4189 |
| Primary Part Number | N272-1842-1 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sterling Engine Co Inc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 1.500 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Securing Method | THREADED HOLE(S) |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.500 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | B |
| Outside Diameter | 4.813 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | WEBBED OR SPOKED |
| Groove Depth | 0.688 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 38.0 |
| Distance From Center of Bore to Bottom of Keyway | 0.3875 INCHES MINIMUM AND 0.3905 INCHES MAXIMUM IN |
| Securing Hole Quantity | 1 |
| Thread Size | 3/8 - 16 |
| Keyway Width | 0.157 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.875 INCHES NOMINAL AA END AND 0.250 INCHES NOMINAL BB END IN |
| Hole Location | LOCATED 180 DEG FROM KEYWAY |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.624 INCHES MINIMUM AND 0.625 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 |
| Part Number | Manufacturer |
|---|---|
| N272-1842-1 PRIMARY | Sterling Engine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| N-272-1B-42-1 | C/1 Advisory reference — outside the item-of-supply concept Cooper Cameron Corp Ajax-Superior Div |
| 83612S4105-572400PC3 | 3/2 Design control — primary reference U.S. Government activity |
| NP13400PC3 | 5/9 Secondary reference Cooper Cameron Corp Ajax-Superior Div |
NSN 3020-00-256-4189 is a Pulley,groove, manufactured by Sterling Engine Co Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-256-4189 has 1 manufacturer part number on file: N272-1842-1 (Sterling Engine Co Inc).
Key specifications for N272-1842-1: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 1.500 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Securing Method: THREADED HOLE(S). 28 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.