The Valve,check, cataloged under National Stock Number 4820-01-281-5852, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Electric Boat Corporation Div General Dynamics Electric Boat. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-281-5852 |
| Primary Part Number | 2620-927X9 ASSEMBLY RB |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Electric Boat Corporation Div General Dynamics Electric Boat |
| Status | ACTIVE |
| Mounting Position | HORIZONTAL |
| Nominal Thickness | 1.375 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 7.438 INCHES ALL ENDS IN |
| Valve Size | 3.000 INCHES IN |
| Face to Face Distance | 11.750 INCHES IN |
| Flow Control Device | DISK |
| Bolt Circle Nominal Diameter | 5.938 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Maximum Operating Temp | 160.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Hole Quantity | 8 ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Connection Type | FLANGE ALL ENDS |
| Material | COPPER ALLOY 903 FLOW CONTROL DEVICE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Material | COPPER ALLOY 955 BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 2620-927X9 | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 2620-927X9 ASSEMBLY RB PRIMARY | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| SS845-2181251 ASSEMBLY RBSS | Naval Inventory Control Point Mechanicsburg (USA) |
| SS845-2181251 | Naval Inventory Control Point Mechanicsburg (USA) |
| SS845-2181251 ASSEMBLY RB | Naval Inventory Control Point Mechanicsburg (USA) |
NSN 4820-01-281-5852 is a Valve,check, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-281-5852 has 5 cross-referenced part numbers: 2620-927X9 (Electric Boat Corporation Div General Dynamics Electric Boat), 2620-927X9 ASSEMBLY RB (Electric Boat Corporation Div General Dynamics Electric Boat), SS845-2181251 ASSEMBLY RBSS (Naval Inventory Control Point Mechanicsburg), SS845-2181251 (Naval Inventory Control Point Mechanicsburg), SS845-2181251 ASSEMBLY RB (Naval Inventory Control Point Mechanicsburg).
There are 7 known substitutes for 4820-01-281-5852: 4820-00-104-4312, 4820-01-063-0053, 4820-01-074-0297 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 2620-927X9 ASSEMBLY RB: Mounting Position: HORIZONTAL; Nominal Thickness: 1.375 INCHES ALL ENDS IN; Nominal Outside Diameter: 7.438 INCHES ALL ENDS IN; Valve Size: 3.000 INCHES IN. 17 total characteristics are documented in the Federal Logistics Information System.