The Pulley,groove, cataloged under National Stock Number 3020-01-397-5742, 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 Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. Government technical data includes 28 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-397-5742 |
| Primary Part Number | 2AK34SS |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 2.000 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Outside Diameter | 3.450 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Groove Depth | 0.470 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 2 |
| V Groove Angle in Deg | 34.0 |
| Protruding Hub Characteristic | PLAIN |
| Distance From Center of Bore to Bottom of Keyway | 0.719 INCHES NOMINAL IN |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.625 INCHES NOMINAL AA END IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.188 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Furnished Items | KEYING FACILITY |
| Face Width | 1.375 INCHES NOMINAL IN |
| Groove Width | 0.500 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 |
|---|---|
| 2AK34SS PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| Reference | Meaning |
|---|---|
| 89D0007 ITEM 54 | 5/9 Secondary reference U.S. Government activity |
| 2AK34 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 91D5 ITEM NO. 54 | 5/9 Secondary reference U.S. Government activity |
| 89D0005 ITEM NO. 54 | 5/9 Secondary reference U.S. Government activity |
| 2AK56SS | 5/9 Secondary reference U.S. Government activity |
| 2AK64SS | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 91D4,91D5 ITEM 54 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-01-397-5742 is a Pulley,groove, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-397-5742 has 1 manufacturer part number on file: 2AK34SS (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil).
Key specifications for 2AK34SS: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED; Bore Length: 2.000 INCHES NOMINAL IN. 28 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.