The Pulley,groove, cataloged under National Stock Number 3020-00-437-6989, 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 Control Flow, Inc. Dba Control Flow Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-437-6989 |
| Primary Part Number | C7155-205-4 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Control Flow, Inc. Dba Control Flow Inc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Securing Method | DRILLED HOLE |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.375 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Radius | 0.281 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 11.500 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Groove Depth | 0.531 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Distance From Center of Bore to Bottom of Keyway | 1.547 INCHES NOMINAL IN |
| Securing Hole Quantity | 3 |
| Drilled Hole Diameter | 1.000 INCHES NOMINAL IN |
| Keyway Width | 0.500 INCHES NOMINAL IN |
| Hole Location | EQUALLY SPACED AROUND BORE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 2.594 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Furnished Items | KEYING FACILITY |
| Face Width | 1.375 INCHES NOMINAL IN |
| Groove Width | 0.562 INCHES NOMINAL IN |
| Securing Location | BOTH ENDS |
| 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 |
|---|---|
| C111963 | Control Flow, Inc. Dba Control Flow Inc (USA) |
| C7155-205-4 PRIMARY | Control Flow, Inc. Dba Control Flow Inc (USA) |
| Reference | Meaning |
|---|---|
| C7155-205-4 | 5/9 Secondary reference Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division |
| C111963 | 5/9 Secondary reference Control Flow, Inc. Dba Westech Heavy Machinery Division Div Westech Heavy Machinery Division |
NSN 3020-00-437-6989 is a Pulley,groove, manufactured by Control Flow, Inc. Dba Control Flow Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-437-6989 has 2 manufacturer part numbers on file: C111963 (Control Flow, Inc. Dba Control Flow Inc), C7155-205-4 (Control Flow, Inc. Dba Control Flow Inc).
Key specifications for C7155-205-4: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Securing Method: DRILLED HOLE; Split Hub Feature: NOT 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.