The Seat,valve, cataloged under National Stock Number 4820-01-220-0932, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Griswold Industries Dba Cla-Val Co. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-220-0932 |
| Primary Part Number | 64788D |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Griswold Industries Dba Cla-Val Co |
| Status | ACTIVE |
| Thread Series Designator | NPT SECOND THREADED PORTION |
| Material | NICKEL ALLOY OVERALL |
| Nominal Thread Size | 0.375 INCHES SECOND THREADED PORTION IN |
| Flange Diameter | 0.880 INCHES NOMINAL IN |
| Nominal Thread Size | 0.625 INCHES FIRST THREADED PORTION IN |
| Flange Seat to Disk End Height | 0.753 INCHES NOMINAL IN |
| Seating Surface Shape | FLAT |
| Thread Class | 1B FIRST THREADED PORTION |
| Thread Series Designator | UNF FIRST THREADED PORTION |
| Under Flange Height | 0.687 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 31642 PIECE 10 | Naval Ship Systems Command (USA) |
| 31642 PIECE 10 | Griswold Industries Dba Cla-Val Co (USA) |
| 64788D PRIMARY | Griswold Industries Dba Cla-Val Co (USA) |
| 31642 | Naval Ship Systems Command (USA) |
| 31642 | Griswold Industries Dba Cla-Val Co (USA) |
| 31651 | Griswold Industries Dba Cla-Val Co (USA) |
NSN 4820-01-220-0932 is a Seat,valve, manufactured by Griswold Industries Dba Cla-Val Co, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-220-0932 has 6 cross-referenced part numbers: 31642 PIECE 10 (Naval Ship Systems Command), 31642 PIECE 10 (Griswold Industries Dba Cla-Val Co), 64788D (Griswold Industries Dba Cla-Val Co), 31642 (Naval Ship Systems Command), 31642 (Griswold Industries Dba Cla-Val Co) and 1 more.
There are 9 known substitutes for 4820-01-220-0932: 5365-00-355-2145, 5330-00-391-8600, 5930-00-522-3556 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 64788D: Thread Series Designator: NPT SECOND THREADED PORTION; Material: NICKEL ALLOY OVERALL; Nominal Thread Size: 0.375 INCHES SECOND THREADED PORTION IN; Flange Diameter: 0.880 INCHES NOMINAL IN. 10 total characteristics are documented in the Federal Logistics Information System.