The Pulley,groove, cataloged under National Stock Number 3020-00-287-7920, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Langdon Mfg Co. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 3020-00-287-7920 |
| Primary Part Number | 20221A1 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — No Item Name Available |
| Manufacturer | Langdon Mfg Co |
| Status | CANCELLED |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024, T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Distance From Outside Flange/rim to Hub End and Location | 0.059 INCHES NOMINAL BOTH ENDS IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Split Hub Feature | NOT INCLUDED |
| Counterbore Feature | NOT INCLUDED |
| Groove Shape | U |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Bearing Type | BALL |
| Design Form | PLAIN |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Bearings | INCLUDED |
| Bearing Quantity | 1 |
| Bore Type | STRAIGHT |
| Lightening Hole | NOT INCLUDED |
| Groove Quantity | 1 |
| Unable to Decode | UNABLE TO DECODE |
| Hub Outside Diameter | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM BOTH ENDS IN |
| Face Width | 0.507 INCHES NOMINAL IN |
| Groove Radius | 0.130 INCHES NOMINAL IN |
| Groove Depth | 0.312 INCHES NOMINAL IN |
| Bore Diameter | 0.3120 INCHES MINIMUM AND 0.3145 INCHES MAXIMUM IN |
| Outside Diameter | 2.630 INCHES NOMINAL IN |
| Bore Length | 0.625 INCHES NOMINAL IN |
| Groove Width | 0.360 INCHES NOMINAL IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20221A1 | Langdon Mfg Co (USA) |
| R221A1-FRP | Ralmark Co (USA) |
| AN221A1 | Aeronautical Standards Group Dept of Navy and Air Force (USA) |
| 703-2298073 PIECE 34 | Puget Sound Naval Shipyard and Intermediate Maintence Facility (USA) |
| NAS378A1 | National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA) |
| MS20221A1 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-DTL-7034/3 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| NAS378-1 | National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA) |
| 9D0201A1 | The Boeing Company (USA) |
| 20221A1 | B and B Motor and Control Corp (USA) |
| 9D0201 | The Boeing Company (USA) |
| 20221A1 | Atco Pulley Corp |
| APAP8-5-42 | Arvan, Inc. Dba Aerospace Division (USA) |
| BM20221-A1-FR | Bell-Memphis Inc (USA) |
| 20221A1 | Arvan, Inc. Dba Aerospace Division (USA) |
NSN 3020-00-287-7920 is a Pulley,groove, manufactured by Langdon Mfg Co, classified under FSC 3020 (No Item Name Available). Status: cancelled.
NSN 3020-00-287-7920 has 15 cross-referenced part numbers: 20221A1 (Langdon Mfg Co), R221A1-FRP (Ralmark Co), AN221A1 (Aeronautical Standards Group Dept of Navy and Air Force), 703-2298073 PIECE 34 (Puget Sound Naval Shipyard and Intermediate Maintence Facility), NAS378A1 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use) and 10 more.
There are 5 known substitutes for 3020-00-287-7920: 3020-00-200-1537, 3020-00-287-9662, 3020-00-517-1327 and 2 more. Verify interchangeability with system specifications before substitution.
Key specifications for 20221A1: Style Designator: PLAIN; Special Features: IF REQUISITION IS NOT FOR FMS, OVERSEAS SHIPMENTS, NAVAL VESSELS, PRIORITY CODES 1,2, OR 3, OR INDIVIDUAL REQUISITIONS OVER 25000 DOLLARS, THEN DIRECT VENDOR DELIVERY NSN 3020-01-391-0850 IS AVAILABLE AT 15.7% DISCOUNT.; Material Document and Classification: QQ-A-225/6, ALLOY 2024, T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Distance From Outside Flange/rim to Hub End and Location: 0.059 INCHES NOMINAL BOTH ENDS IN. 29 total characteristics are documented in the Federal Logistics Information System.
NSN 3020-00-287-7920 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.