The Seat,valve, cataloged under National Stock Number 4820-00-873-3851, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Drs Environmental Systems Inc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-873-3851 |
| Primary Part Number | 26670 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Drs Environmental Systems Inc |
| Status | ACTIVE |
| Nominal Thread Size | 0.375 INCHES SECOND THREADED PORTION IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST THREADED PORTION |
| Material | COPPER ALLOY OVERALL |
| Under Flange Height | 0.650 INCHES NOMINAL IN |
| Nominal Thread Size | 0.312 INCHES FIRST THREADED PORTION IN |
| Thread Length | 0.250 INCHES NOMINAL FIRST THREADED PORTION IN |
| Seal Accommodation Type | SLEEVE |
| Thread Class | 2A FIRST THREADED PORTION A |
| Body Inside Diameter | 0.174 INCHES NOMINAL IN |
| Seating Surface Shape | FLAT |
| Thread Length | 0.230 INCHES MINIMUM SECOND THREADED PORTION IN |
| Thread Series Designator | NPT SECOND THREADED PORTION |
| Body Outside Diameter | 0.375 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-00-873-3851 is a Seat,valve, manufactured by Drs Environmental Systems Inc, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-873-3851 has 3 cross-referenced part numbers: 26670 (Drs Environmental Systems Inc), 26670 (Davey Compressor Co Div of Keco Industries Inc), 26670 (Hdt Expeditionary Systems Inc).
There are 8 known substitutes for 4820-00-873-3851: 6220-00-300-0803, 2590-00-371-3137, 2805-00-376-4273 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 26670: Overall Height: 0.910 INCHES NOMINAL IN; Nominal Thread Size: 0.375 INCHES SECOND THREADED PORTION IN; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) FIRST THREADED PORTION; Material: COPPER ALLOY OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.