The Seat,valve, cataloged under National Stock Number 4820-01-469-7578, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Lawler Manufacturing Company, Inc.. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-469-7578 |
| Primary Part Number | 3964 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Lawler Manufacturing Company, Inc. |
| Status | ACTIVE |
| Body Inside Diameter | 0.937 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 464 SEAT |
| Specification/standard Data | 75545-QQ-B639 GOVERNMENT STANDARD |
| Material Document and Classification | QQ-B-639 FED STD SINGLE MATERIAL RESPONSE SEAT |
| Style Designator | THREADED FLANGED |
| Seat Radius | 0.625 INCHES NOMINAL IN |
| Flange Diameter | 1.500 INCHES NOMINAL IN |
| Nominal Thread Size | 1.250 INCHES SINGLE THREADED PORTION IN |
| Thread Length | 0.093 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Under Flange Height | 0.093 INCHES NOMINAL IN |
| Thread Series Designator | UNEF SINGLE THREADED PORTION |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Seating Surface Shape | RADIAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1767-D-19 | Lawler Manufacturing Company, Inc. (USA) |
| 1767-D PC 19 | Lawler Manufacturing Company, Inc. (USA) |
| 3964 PRIMARY | Lawler Manufacturing Company, Inc. (USA) |
| 1767-D | Lawler Manufacturing Company, Inc. (USA) |
NSN 4820-01-469-7578 is a Seat,valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-469-7578 has 4 cross-referenced part numbers: 1767-D-19 (Lawler Manufacturing Company, Inc.), 1767-D PC 19 (Lawler Manufacturing Company, Inc.), 3964 (Lawler Manufacturing Company, Inc.), 1767-D (Lawler Manufacturing Company, Inc.).
There are 12 known substitutes for 4820-01-469-7578: 5950-00-230-1008, 5120-00-287-2507, 5120-00-293-1549 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3964: Body Inside Diameter: 0.937 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN; Material: COPPER ALLOY 464 SEAT; Specification/standard Data: 75545-QQ-B639 GOVERNMENT STANDARD; Material Document and Classification: QQ-B-639 FED STD SINGLE MATERIAL RESPONSE SEAT. 16 total characteristics are documented in the Federal Logistics Information System.