The Seat,valve, cataloged under National Stock Number 4820-01-256-4879, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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 | 4820-01-256-4879 |
| Primary Part Number | 801-01 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| Seating Surface Shape | FLAT |
| Body Inside Diameter | 3.875 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| Style Designator | THREADED FLANGED |
| Thread Quantity Per Inch | 14 SINGLE THREADED PORTION |
| Thread Class | 3B SINGLE THREADED PORTION |
| Thread Length | 0.875 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Flange Seat to Disk End Height | 0.312 INCHES NOMINAL IN |
| Nominal Thread Size | 4.250 INCHES SINGLE THREADED PORTION IN |
| Flange Diameter | 4.375 INCHES NOMINAL IN |
| Under Flange Height | 1.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 801-01 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-01-256-4879 is a Seat,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-256-4879 has 1 cross-referenced part number: 801-01 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
There are 7 known substitutes for 4820-01-256-4879: 5961-00-880-2938, 5930-01-013-0571, 4820-01-314-2561 and 4 more. Verify interchangeability with system specifications before substitution.
Key specifications for 801-01: Seating Surface Shape: FLAT; Body Inside Diameter: 3.875 INCHES NOMINAL IN; Material: COPPER ALLOY BODY; Thread Series Designator: UN SINGLE THREADED PORTION. 12 total characteristics are documented in the Federal Logistics Information System.