The Valve,check, cataloged under National Stock Number 4820-01-056-1591, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is National Oilwell. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-056-1591 |
| Primary Part Number | 2621-927-10ASSYIA |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | National Oilwell |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 2621-927-10ASSYIA | National Oilwell (USA) |
| 2620-927X10ASSYFL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2621-927-10ASSYIAL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2620-927X10ASSYF | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| D3791-2.-AL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2621-927-10ASSYIA | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| D3791-2.-A | Naval Sea Systems Command Logistics Support Engineering Activity (USA) |
| SS845-2181253ASSYFL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2620-927X10ASSYF | National Oilwell (USA) |
| SS845-2181253ASSYF | Naval Sea Systems Command (USA) |
NSN 4820-01-056-1591 is a Valve,check, manufactured by National Oilwell, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-056-1591 has 10 cross-referenced part numbers: 2621-927-10ASSYIA (National Oilwell), 2620-927X10ASSYFL1 (Naval Inventory Control Point Mechanicsburg), 2621-927-10ASSYIAL1 (Naval Inventory Control Point Mechanicsburg), 2620-927X10ASSYF (Electric Boat Corporation Div General Dynamics Electric Boat), D3791-2.-AL1 (Naval Inventory Control Point Mechanicsburg) and 5 more.
There is 1 known substitute for 4820-01-056-1591: 4820-01-113-7824. Verify interchangeability with system specifications before substitution.
Key specifications for 2621-927-10ASSYIA: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. 2 total characteristics are documented in the Federal Logistics Information System.