The Seat,valve, cataloged under National Stock Number 4820-00-337-1101, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-337-1101 |
| Primary Part Number | 9975 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Body Inside Diameter | 0.688 INCHES NOMINAL IN |
| Flange Diameter | 2.000 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.188 INCHES NOMINAL IN |
| Seating Surface Shape | ANGULAR |
| Material | COBALT ALLOY SEAT |
| Style Designator | PLAIN FLANGED |
| Material | STEEL BODY |
| Body Outside Diameter | 1.500 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.000 NOMINAL |
| Under Flange Height | 0.750 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AD14S46-019PC385 | Naval Ship Systems Command (USA) |
| D15-621JPC342 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-621BPC342 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-621PPC342 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-439BPC385 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-439IPC385 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| AD14S46-014PC385 | Naval Ship Systems Command (USA) |
| D15-439IPC385 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-621BPC342 | Westinghouse Electric Corp (USA) |
| D15-439-J | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-621NPC342 | Westinghouse Electric Corp (USA) |
| D15-439-B | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-439NPC385 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-439-J PC 342 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-439NPC385 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| AD14-S46-015 PC 342 | Naval Ship Systems Command (USA) |
| CM5S4601-035PC34 | Naval Ship Systems Command (USA) |
| 9975 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-439PPC385 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-439PPC385 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
NSN 4820-00-337-1101 is a Seat,valve, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-337-1101 has 50 cross-referenced part numbers: AD14S46-019PC385 (Naval Ship Systems Command), D15-621JPC342 (Westinghouse Electric Corp Sturtevant Div), D15-621BPC342 (Northrop Grumman Systems Corporation Div Marine Systems), D15-621PPC342 (Northrop Grumman Systems Corporation Div Marine Systems), D15-439BPC385 (Westinghouse Electric Corp Sturtevant Div) and 45 more.
There are 8 known substitutes for 4820-00-337-1101: 3439-00-009-2334, 6625-01-017-3026, 5935-01-023-2501 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 9975: Body Inside Diameter: 0.688 INCHES NOMINAL IN; Flange Diameter: 2.000 INCHES NOMINAL IN; Flange Seat to Disk End Height: 0.188 INCHES NOMINAL IN; Seating Surface Shape: ANGULAR. 10 total characteristics are documented in the Federal Logistics Information System.