The Pulley,groove, cataloged under National Stock Number 3020-01-174-3841, 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 Emerson Electric Co Browning Mfg Div. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-174-3841 |
| Primary Part Number | 2TB74 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Emerson Electric Co Browning Mfg Div |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Taper Bore Minor Diameter | 2.765 INCHES NOMINAL IN |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 2.781 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | A AND B |
| Outside Diameter | 7.750 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Taper Major Diameter Location | AA END |
| Quantity | 1 |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 7.000 INCHES NOMINAL AND 7.400 INCHES NOMINAL IN |
| Groove Depth | 0.625 INCHES NOMINAL IN |
| Bore Type | TAPERED |
| Bearings | NOT INCLUDED |
| Groove Quantity | 2 |
| Taper Bore Major Diameter | 2.875 INCHES NOMINAL IN |
| V Groove Angle in Deg | 38.0 |
| Protruding Hub Characteristic | PLAIN |
| Distance From Center of Bore to Bottom of Keyway | 1.688 INCHES NOMINAL IN |
| Keyway Width | 0.500 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.750 INCHES NOMINAL AA END AND 0.062 INCHES NOMINAL BB END IN |
| Counterbore Feature | NOT INCLUDED |
| Material | IRON CAST OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| 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 |
|---|---|
| 2TB74 PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
NSN 3020-01-174-3841 is a Pulley,groove, manufactured by Emerson Electric Co Browning Mfg Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-174-3841 has 1 manufacturer part number on file: 2TB74 (Emerson Electric Co Browning Mfg Div).
Key specifications for 2TB74: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Taper Bore Minor Diameter: 2.765 INCHES NOMINAL IN; 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.