The Pulley,groove, cataloged under National Stock Number 3020-01-271-6172, 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 Schaefer Marine, Inc.. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-271-6172 |
| Primary Part Number | 62-129BW |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Schaefer Marine, Inc. |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.488 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 1.735 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Groove Depth | 0.375 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 75.0 |
| Bearing Type | SLEEVE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.638 INCHES NOMINAL IN |
| Material | ALUMINUM OVERALL |
| Face Width | 1.488 INCHES NOMINAL IN |
| Groove Width | 1.375 INCHES NOMINAL IN |
| 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 |
|---|---|
| 62-129BW PRIMARY | Schaefer Marine, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 62-129 | 5/9 Secondary reference Schaefer Marine, Inc. |
NSN 3020-01-271-6172 is a Pulley,groove, manufactured by Schaefer Marine, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-271-6172 has 1 manufacturer part number on file: 62-129BW (Schaefer Marine, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-649-2549. Verify interchangeability with system specifications before substitution.
Key specifications for 62-129BW: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Bearing Quantity: 1; Split Hub Feature: NOT INCLUDED. 21 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.