The Pulley,groove, cataloged under National Stock Number 3020-00-451-6677, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-451-6677 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 1.190 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.228 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | A-BELT |
| Outside Diameter | 3.984 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | WEBBED OR SPOKED |
| Material Document and Classification | QQ-S-634,COMP 1010 THRU 1025,CF OR CD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.224 INCHES NOMINAL IN |
| Groove Depth | 0.380 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 3 |
| V Groove Angle in Deg | 38.0 |
| Distance From Center of Bore to Bottom of Keyway | 0.494 INCHES NOMINAL IN |
| Keyway Width | 0.189 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | CADMIUM |
| Distance From Outside Flange/rim to Hub End and Location | 0.136 INCHES NOMINAL AA END IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.781 INCHES MINIMUM AND 0.782 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 1.500 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 |
|---|---|
| 2587909 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-451-6677 is a Pulley,groove, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-451-6677: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 1.190 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 30 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.