The Plate,retaining,valve, cataloged under National Stock Number 4820-01-157-2970, 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 1 verified specification, 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 | 4820-01-157-2970 |
| Primary Part Number | 87643-9803 ITEM 4 |
| Item Name | Plate,retaining,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Electric Boat Corporation Div General Dynamics Electric Boat |
| Status | ACTIVE |
| General Characteristics Item Description | NICKEL COPPER ALLOY QQ-N-281 CL A,A8 ROLLED;OD 7.000 IN.;4 HOLES 0.531 IN. DIA THRU AND CENTERBORE 0.781 IN. DIA BY 0.562 IN. DEEP ON 5.500 IN. DEEP BOLT CIRLCE;ID 2.250 IN.;0.875 IN. THICK 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 4 PRIMARY | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 501-4675791 ITEM 4 PRIMARY | Naval Ship Systems Command (USA) |
NSN 4820-01-157-2970 is a Plate,retaining,valve, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-157-2970 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 4 (Electric Boat Corporation Div General Dynamics Electric Boat), 501-4675791 ITEM 4 (Naval Ship Systems Command).
There are 7 known substitutes for 4820-01-157-2970: 4730-01-094-9697, 4820-01-137-6055, 4820-01-154-9749 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 87643-9803 ITEM 4: General Characteristics Item Description: NICKEL COPPER ALLOY QQ-N-281 CL A,A8 ROLLED;OD 7.000 IN.;4 HOLES 0.531 IN. DIA THRU AND CENTERBORE 0.781 IN. DIA BY 0.562 IN. DEEP ON 5.500 IN. DEEP BOLT CIRLCE;ID 2.250 IN.;0.875 IN. THICK IN. 1 total characteristics are documented in the Federal Logistics Information System.