The Seat,valve, cataloged under National Stock Number 4820-01-244-4338, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-244-4338 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.500 INCHES NOMINAL SECOND THREADED PORTION IN |
| Style Designator | DOUBLE FLANGED |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 1.375 INCHES NOMINAL IN |
| Nominal Thread Size | 0.875 INCHES FIRST THREADED PORTION IN |
| Nominal Thread Size | 1.750 INCHES SECOND THREADED PORTION IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A SECOND THREADED PORTION A |
| Thread Class | 2A FIRST THREADED PORTION A |
| Material | STEEL CORROSION RESISTING SEAT |
| Thread Series Designator | UNF FIRST THREADED PORTION |
| Thread Series Designator | UNF SECOND THREADED PORTION |
| Seating Surface Shape | FLAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 7-40178-1 | 3/9 Design control — primary reference Technetics Group Llc Dba Technetics Group Burbank |
| 7-040178-1 | 5/9 Secondary reference Senior Operations Llc Div Senior Aerospace Ketema |
| 7-040178 | D/9 Drawing number reference only Senior Operations Llc Div Senior Aerospace Ketema |
NSN 4820-01-244-4338 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-244-4338: Overall Height: 2.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.500 INCHES NOMINAL SECOND THREADED PORTION IN; Style Designator: DOUBLE FLANGED. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.