The Pulley,flat, cataloged under National Stock Number 3020-01-273-4784, 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 Hemco Tool & Die Inc. Government technical data includes 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-273-4784 |
| Primary Part Number | 5187134 |
| Item Name | Pulley,flat |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Hemco Tool & Die Inc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | NOT INCLUDED |
| Securing Method | DRILLED HOLE |
| Split Hub Feature | NOT INCLUDED |
| Design Form | WEBBED |
| Unable to Decode | UNABLE TO DECODE |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Flange Quantity | 2 |
| First Step Face Largest Diameter and Location | 1.313 INCHES NOMINAL AA END IN |
| Outside Diameter | 1.620 INCHES NOMINAL IN |
| Distance From Outside Flange/rim to Hub End and Location | 0.300 INCHES NOMINAL AA END IN |
| Second Step Length | 0.250 INCHES NOMINAL AA END IN |
| Style Designator | PLAIN |
| Outside Diameter | 1.620 INCHES NOMINAL IN |
| Rim Type | SOLID |
| Protruding Hub Characteristic | STEPPED |
| Unable to Decode | UNABLE TO DECODE |
| First Step Length | 0.050 INCHES NOMINAL AA END IN |
| Securing Hole Quantity | 3 |
| Drilled Hole Diameter | 0.159 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | ANODIZE |
| Distance From Outside Flange/rim to Hub End and Location | 0.300 INCHES NOMINAL AA END IN |
| Hole Location | 2ND END,0.850 IN. LG IN |
| Flange Location | INSIDE AND OUTSIDE |
| Face Width | 0.660 INCHES NOMINAL IN |
| Securing Location | BB END |
| Lightening Hole | NOT INCLUDED |
| 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 |
|---|---|
| 5187134 PRIMARY | Hemco Tool & Die Inc (USA) |
| 5187134 | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| 5187134 | D/9 Drawing number reference only Naval Sea Systems Command |
| 3020PL0986323 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 3020-01-273-4784 is a Pulley,flat, manufactured by Hemco Tool & Die Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-273-4784 has 2 manufacturer part numbers on file: 5187134 (Hemco Tool & Die Inc), 5187134 (Raytheon Company).
Key specifications for 5187134: Integral Cooling Vane: NOT INCLUDED; Bore Feature: NOT INCLUDED; Securing Method: DRILLED HOLE; Split Hub Feature: NOT INCLUDED. 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.