The Pulley,groove, cataloged under National Stock Number 3020-01-112-1927, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-112-1927 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 3.125 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Taper Bore Minor Diameter | 1.562 INCHES NOMINAL IN |
| Securing Method | SPLIT-TAPERED BUSHING |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.875 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | 4L AND A |
| Outside Diameter | 4.750 INCHES NOMINAL IN |
| Taper Major Diameter Location | BB END |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 4.160 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN |
| Groove Depth | 0.490 INCHES NOMINAL IN |
| Bore Type | TAPERED |
| Bearings | NOT INCLUDED |
| Groove Quantity | 2 |
| Taper Bore Major Diameter | 1.625 INCHES NOMINAL IN |
| V Groove Angle in Deg | 34.0 |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | PAINT |
| Distance From Outside Flange/rim to Hub End and Location | 0.500 INCHES NOMINAL BB END IN |
| Counterbore Feature | NOT INCLUDED |
| Material | IRON CAST OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 1.375 INCHES NOMINAL IN |
| Groove Width | 0.494 INCHES NOMINAL 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 |
|---|---|
| 18926 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-112-1927 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5985-01-590-7859. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-112-1927: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 3.125 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Taper Bore Minor Diameter: 1.562 INCHES NOMINAL IN. 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.