The Disk,valve, cataloged under National Stock Number 4820-01-137-6055, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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 | 4820-01-137-6055 |
| Primary Part Number | 87643-9803 ITEM 25 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Electric Boat Corporation Div General Dynamics Electric Boat |
| Status | ACTIVE |
| Material | RUBBER CHLOROPRENE CLASS CR |
| Inside Diameter | 0.546 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Outside Diameter | 3.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 87643-9803 | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 501-4675791 | Naval Ship Systems Command (USA) |
| 87643-9803 ITEM 25 PRIMARY | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 501-4675791 ITEM 25 PRIMARY | Naval Ship Systems Command (USA) |
NSN 4820-01-137-6055 is a Disk,valve, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-137-6055 has 4 cross-referenced part numbers: 87643-9803 (Electric Boat Corporation Div General Dynamics Electric Boat), 501-4675791 (Naval Ship Systems Command), 87643-9803 ITEM 25 (Electric Boat Corporation Div General Dynamics Electric Boat), 501-4675791 ITEM 25 (Naval Ship Systems Command).
There are 7 known substitutes for 4820-01-137-6055: 4730-01-094-9697, 4820-01-154-9749, 4820-01-154-9750 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 87643-9803 ITEM 25: Material: RUBBER CHLOROPRENE CLASS CR; Overall Height: 1.093 INCHES NOMINAL IN; Inside Diameter: 0.546 INCHES NOMINAL IN; Style Designator: PLAIN. 5 total characteristics are documented in the Federal Logistics Information System.