The Pulley,flat, cataloged under National Stock Number 3020-00-321-6403, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-321-6403 |
| Primary Part Number | 8699767 |
| Item Name | Pulley,flat |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 2.000 INCHES NOMINAL AA END IN |
| Hub Outside Diameter | 1.625 INCHES NOMINAL BB END IN |
| Bore Feature | INCLUDED |
| Taper Bore Minor Diameter | 0.814 INCHES NOMINAL IN |
| Securing Method | DRILLED HOLE |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.500 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Flange Quantity | 1 |
| Outside Diameter | 8.375 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Taper Major Diameter Location | AA END |
| Quantity | 1 |
| Style Designator | WEBBED OR SPOKED |
| Material Document and Classification | QQ-I-666, GRADE 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.437 INCHES MINIMUM AND 5.446 INCHES MAXIMUM IN |
| Outside Diameter | 8.375 INCHES NOMINAL IN |
| Rim Type | SOLID |
| Bore Type | TAPERED |
| Bearings | NOT INCLUDED |
| Taper Bore Major Diameter | 1.001 INCHES NOMINAL IN |
| Protruding Hub Characteristic | PLAIN |
| Distance From Center of Bore to Bottom of Keyway | 0.633 INCHES NOMINAL IN |
| Securing Hole Quantity | 1 |
| Drilled Hole Diameter | 0.250 INCHES NOMINAL IN |
| Keyway Width | 0.251 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE AND ENAMEL |
| 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 |
|---|---|
| 8699767 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 37883 | 5/9 Secondary reference Prestolite Electric Inc |
NSN 3020-00-321-6403 is a Pulley,flat, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-321-6403 has 1 manufacturer part number on file: 8699767 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 2520-00-586-9866. Verify interchangeability with system specifications before substitution.
Key specifications for 8699767: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 2.000 INCHES NOMINAL AA END IN; Hub Outside Diameter: 1.625 INCHES NOMINAL BB END IN; Bore Feature: INCLUDED. 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.