The Pulley,groove, cataloged under National Stock Number 3020-01-355-7709, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-355-7709 |
| Primary Part Number | 2TB56 & P1 1 |
| 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 |
| Hub Outside Diameter | 3.000 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Securing Method | SPLIT-TAPERED BUSHING |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 2.188 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | A AND B |
| Outside Diameter | 5.950 INCHES NOMINAL IN |
| Shaft Size for Which Designed | 1.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 5.200 INCHES MINIMUM AND 5.600 INCHES MAXIMUM IN |
| Groove Depth | 0.580 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 2 |
| V Groove Angle in Deg | 34.0 |
| Protruding Hub Characteristic | PLAIN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.188 INCHES NOMINAL AA END IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.000 INCHES NOMINAL IN |
| Material | IRON CAST OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 1.750 INCHES NOMINAL IN |
| Groove Width | 0.637 INCHES NOMINAL IN |
| Furnished Items and Quantity | P1 BUSHING W/1.00 IN.BORE IN |
| Securing Location | AA END |
| 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 |
|---|---|
| 2TB56 & P1 1 PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| Reference | Meaning |
|---|---|
| 2TB56-1.00 IN.BORE | 5/9 Secondary reference Emerson Electric Co Alco Controls Div |
| 2TB56/P1-1.00 IN.BORE | 5/9 Secondary reference Emerson Electric Co Browning Mfg Div |
| 2TB56/P1X1 | 5/9 Secondary reference Emerson Electric Co Browning Mfg Div |
NSN 3020-01-355-7709 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 3020-01-355-7709 has 1 manufacturer part number on file: 2TB56 & P1 1 (Emerson Electric Co Browning Mfg Div).
Key specifications for 2TB56 & P1 1: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 3.000 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Securing Method: SPLIT-TAPERED BUSHING. 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.