The Seat,valve, cataloged under National Stock Number 4820-01-050-2176, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-050-2176 |
| Primary Part Number | 30001 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace Llc |
| Status | ACTIVE |
| Flange Diameter | 0.7490 INCHES MINIMUM AND 0.7495 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.635 INCHES MINIMUM AND 0.638 INCHES MAXIMUM IN |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | ABKK |
| Body Stepped Inside Diameter | 0.375 INCHES NOMINAL SECOND STEP IN |
| Body Stepped Inside Diameter | 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM FIRST STEP IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OR AMS5630 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5623 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL COMP 440C OR STEEL COMP 440F OVERALL |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 30001 PRIMARY | Eaton Aerospace Llc (USA) |
NSN 4820-01-050-2176 is a Seat,valve, manufactured by Eaton Aerospace Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-050-2176 has 1 manufacturer part number on file: 30001 (Eaton Aerospace Llc).
Key specifications for 30001: Flange Diameter: 0.7490 INCHES MINIMUM AND 0.7495 INCHES MAXIMUM IN; Overall Height: 0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN; Body Outside Diameter: 0.635 INCHES MINIMUM AND 0.638 INCHES MAXIMUM IN; Hardness Rating: 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL. 9 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.