The Valve,check, cataloged under National Stock Number 4820-01-074-0297, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-074-0297 |
| Primary Part Number | SS845-2181251ASSYRE6IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Valve Size | 6.000 INCHES IN |
| Mounting Position | HORIZONTAL |
| Bolt Hole Quantity | 14 ALL ENDS |
| Connection Type | FLANGE ALL ENDS |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| Material Document and Classification | MIL-B-21230 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Bolt Circle Nominal Diameter | 9.375 INCHES ALL ENDS IN |
| Material Document and Classification | MIL-P-5516,CLASS B MIL SPEC 1ST MATERIAL RESPONSE AND MIL-B-24480 MIL SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Nominal Thickness | 1.938 INCHES ALL ENDS IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR AND ALUMINUM ALLOY FLOW CONTROL DEVICE |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bolt Hole Nominal Diameter | 0.688 INCHES ALL ENDS IN |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Flow Control Device | DISK |
| Flange Face Design | PLAIN ALL ENDS |
| Nominal Outside Diameter | 10.375 INCHES ALL ENDS IN |
| Face to Face Distance | 18.000 INCHES IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| SS845-2181251ASSYRE6IN | Naval Sea Systems Command (USA) |
| 2620-927X9ASSYRE6IN | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 2181251ASSYRE6IN | Naval Sea Systems Command (USA) |
| 2620-927X9ASSYRE6IN | National Oilwell (USA) |
| SS845-2181251 | Naval Sea Systems Command (USA) |
NSN 4820-01-074-0297 is a Valve,check, manufactured by Naval Sea Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-074-0297 has 5 cross-referenced part numbers: SS845-2181251ASSYRE6IN (Naval Sea Systems Command), 2620-927X9ASSYRE6IN (Electric Boat Corporation Div General Dynamics Electric Boat), 2181251ASSYRE6IN (Naval Sea Systems Command), 2620-927X9ASSYRE6IN (National Oilwell), SS845-2181251 (Naval Sea Systems Command).
There are 4 known substitutes for 4820-01-074-0297: 4820-00-104-4312, 4820-01-063-0053, 5340-01-140-4844 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for SS845-2181251ASSYRE6IN: Flange Shape: ROUND WITH HOLES ALL ENDS; Valve Size: 6.000 INCHES IN; Mounting Position: HORIZONTAL; Bolt Hole Quantity: 14 ALL ENDS. 20 total characteristics are documented in the Federal Logistics Information System.