The Pulley,groove, cataloged under National Stock Number 3020-00-435-4637, 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 23 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-435-4637 |
| Primary Part Number | 11633979 |
| Item Name | Pulley,groove |
| 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 |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 4.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | FED-STD-66 AISI 1010 TO 1025 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.312 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 90.0 |
| Bearing Type | SLEEVE |
| Surface Treatment | OXIDE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.8747 INCHES MINIMUM AND 0.8755 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Face Width | 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN |
| Groove Width | 0.625 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 |
|---|---|
| 11633979 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3020-00-435-4637 is a Pulley,groove, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-435-4637 has 1 manufacturer part number on file: 11633979 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 11633979: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Bearing Quantity: 1; Split Hub Feature: NOT INCLUDED. 23 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.