The Seat,valve, cataloged under National Stock Number 4820-01-093-0864, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, 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 | 4820-01-093-0864 |
| Primary Part Number | 1539 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Lawler Manufacturing Company, Inc. |
| Status | ACTIVE |
| Body Inside Diameter | 2.621 INCHES NOMINAL IN |
| Seating Surface Shape | FLAT |
| Style Designator | THREADED FLANGED |
| Material | COPPER ALLOY OVERALL |
| Material Document and Classification | MIL-B-1654 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Length | 0.635 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Flange Diameter | 3.632 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.165 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN |
| Under Flange Height | 0.938 INCHES NOMINAL IN |
| Nominal Thread Size | 3.500 INCHES SINGLE THREADED PORTION IN |
| Thread Quantity Per Inch | 11 SINGLE THREADED PORTION |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 992-D | Lawler Manufacturing Company, Inc. (USA) |
| 1539 PRIMARY | Lawler Manufacturing Company, Inc. (USA) |
| 992D PIECE 20 | Lawler Manufacturing Company, Inc. (USA) |
NSN 4820-01-093-0864 is a Seat,valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-093-0864 has 3 cross-referenced part numbers: 992-D (Lawler Manufacturing Company, Inc.), 1539 (Lawler Manufacturing Company, Inc.), 992D PIECE 20 (Lawler Manufacturing Company, Inc.).
There are 7 known substitutes for 4820-01-093-0864: 5305-00-626-4302, 4820-01-056-6838, 4820-01-093-2807 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1539: Body Inside Diameter: 2.621 INCHES NOMINAL IN; Seating Surface Shape: FLAT; Style Designator: THREADED FLANGED; Material: COPPER ALLOY OVERALL. 11 total characteristics are documented in the Federal Logistics Information System.