The Seat,valve, cataloged under National Stock Number 4820-00-074-7991, 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 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-074-7991 |
| Primary Part Number | 254-00 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | CANCELLED |
| Nominal Thread Size | 0.625 INCHES SINGLE THREADED PORTION IN |
| Material | COPPER ALLOY OVERALL |
| Thread Quantity Per Inch | 16 SINGLE THREADED PORTION |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| Seating Surface Shape | FLAT |
| Thread Length | 0.250 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Flange Diameter | 1.750 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 0.375 INCHES NOMINAL IN |
| Under Flange Height | 0.250 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Body Inside Diameter | 1.313 INCHES NOMINAL IN |
| Style Designator | THREADED FLANGED |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1356DPC17 | Lawler Manufacturing Company, Inc. (USA) |
| 254-00 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 254 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 3379 PRIMARY | Lawler Manufacturing Company, Inc. (USA) |
| 3379 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-00-074-7991 is a Seat,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-074-7991 has 5 cross-referenced part numbers: 1356DPC17 (Lawler Manufacturing Company, Inc.), 254-00 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 254 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 3379 (Lawler Manufacturing Company, Inc.), 3379 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
There are 12 known substitutes for 4820-00-074-7991: 5935-00-017-0097, 5325-00-051-9777, 3110-00-100-0765 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 254-00: Nominal Thread Size: 0.625 INCHES SINGLE THREADED PORTION IN; Material: COPPER ALLOY OVERALL; Thread Quantity Per Inch: 16 SINGLE THREADED PORTION; Thread Class: 2A SINGLE THREADED PORTION A. 12 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-074-7991 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.