The Pulley,groove, cataloged under National Stock Number 3020-01-078-4904, 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 C&h Distributors, Llc. Government technical data includes 29 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. 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 | 3020-01-078-4904 |
| Primary Part Number | 86-078 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | C&h Distributors, Llc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Split Hub Feature | INCLUDED |
| Bore Length | 1.750 INCHES NOMINAL IN |
| Design Form | SPOKED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | V |
| Outside Diameter | 13.750 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Hub Split Location | THROUGH ONE WALL |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 13.500 INCHES NOMINAL IN |
| Groove Depth | 0.500 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 2 |
| V Groove Angle in Deg | 36.0 |
| Protruding Hub Characteristic | PLAIN |
| Distance From Center of Bore to Bottom of Keyway | 0.594 INCHES NOMINAL IN |
| Keyway Width | 0.188 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | PAINT |
| Distance From Outside Flange/rim to Hub End and Location | 0.375 INCHES NOMINAL AA END IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.000 INCHES MINIMUM AND 1.001 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Clamping Bolt Quantity | 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-01-078-4904 is a Pulley,groove, manufactured by C&h Distributors, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-078-4904 has 2 manufacturer part numbers on file: 86-078 (C&h Distributors, Llc), CAS-9001 (C&h Distributors, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-354-3756. Verify interchangeability with system specifications before substitution.
Key specifications for 86-078: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Split Hub Feature: INCLUDED; Bore Length: 1.750 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.