The Seat,valve, cataloged under National Stock Number 4810-00-218-6077, is classified within Federal Supply Class 4810 (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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 3 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 | 4810-00-218-6077 |
| Primary Part Number | 9958 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — No Item Name Available |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Flange Diameter | 2.125 INCHES NOMINAL IN |
| Material | COBALT ALLOY SEAT |
| Seating Surface Shape | ANGULAR |
| Nominal Thread Size | 1.750 INCHES SINGLE THREADED PORTION IN |
| Material Document and Classification | MIL-S-853,CLASS 3,TYPE A MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Style Designator | THREADED FLANGED |
| Hardness Rating | 202.0 BRINELL STANDARD MINIMUM BODY |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Thread Length | 0.750 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Thread Quantity Per Inch | 12 SINGLE THREADED PORTION |
| Flange Seat to Disk End Height | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.875 INCHES NOMINAL IN |
| Material | STEEL BODY |
| Body Inside Diameter | 1.313 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 9958 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-651PPC677 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-651JPC677 | Westinghouse Electric Corp (USA) |
| D15-651PPC677 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-651PPC677 | Westinghouse Electric Corp (USA) |
| D15-651JPC677 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-651BPC677 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-651JPC677 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-651QPC677 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| 9958 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-651QPC677 | Westinghouse Electric Corp (USA) |
| D15-651QPC677 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-651BPC677 | Westinghouse Electric Corp (USA) |
| 9958 | Westinghouse Electric Corp (USA) |
| D15-651BPC677 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
NSN 4810-00-218-6077 is a Seat,valve, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 4810 (No Item Name Available). Status: active.
NSN 4810-00-218-6077 has 15 cross-referenced part numbers: 9958 (Northrop Grumman Systems Corporation Div Marine Systems), D15-651PPC677 (Northrop Grumman Systems Corporation Div Marine Systems), D15-651JPC677 (Westinghouse Electric Corp), D15-651PPC677 (Westinghouse Electric Corp Sturtevant Div), D15-651PPC677 (Westinghouse Electric Corp) and 10 more.
There are 7 known substitutes for 4810-00-218-6077: 5955-00-499-7337, 2805-00-652-9757, 5950-01-081-2738 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 9958: Flange Diameter: 2.125 INCHES NOMINAL IN; Material: COBALT ALLOY SEAT; Seating Surface Shape: ANGULAR; Nominal Thread Size: 1.750 INCHES SINGLE THREADED PORTION IN. 15 total characteristics are documented in the Federal Logistics Information System.